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... particularly in matters of the magnitudes of the effects. Both events also purport to explain long-standing puzzles. Scenario #1 . The Bosporus silt plug blows. During the last Ice Age, sea levels dropped hundreds of feet exposing the continental shelves. The planet's great rivers cascaded over the edges in great waterfalls. The rocky sill at Gibraltar kept the Atlantic waters out of the Mediterranean, and this sea began to dry up. Farther to the east, the Black Sea was now cut off from the Mediterranean's salty water by the silt-choked Bosporus, that narrow strait separating Asia Minor from Europe. In consequence, the Black Sea became a vast fresh-water lake fed by Europe's rivers to the north. The Ice Age eventually waned, and the oceans and Mediterranean began to rise. About 7,000 years ago, the hydraulic pressure on the Bosporus silt plug became too great and it popped. Salty Mediterranean water poured into lowlands around the Black Sea. Scientists estimate that 50 cubic kilometers of water surged through the Bosporus each -- 200 Niagaras in one colossal waterfall. Falling some 150 meters, the thunder of falling water might have been heard 500 kilometers away! The Black Sea rose quickly, driving the shoreline and humans back a kilometer or two every day. The fleeing Neolithic farmers were forced up into the rich river valleys of Europe, carrying tales of the catastrophe as well as their culture and agricultural know-how into these areas. The Middle East was affected, too. The traumatic experiences of the survivors may have been ...
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... presence of extreme waves was also recorded by Canadian weather buoys moored in the area, and the maximum measured height from buoy 44141 was 30 m (98 feet.)" The Queen Elizabeth II survived the onslaught with minor damage; no passengers or crew members were injured. (Warwick, R.W ., et al; "Hurricane 'Luis', the Queen Elizabeth 2 and a Rogue Wave," Marine Observer, 66:134, 1996) Comments. Even though these so-called "rogue waves" sometimes appear under calm conditions, the stock explanation for them involves the chance addition of two smaller waves from intersecting wave trains. Recently, B. Fornberg and B.S . White have taken a different tack: "Using a mathematical model, they demonstrate that ocean currents or large fields of random eddies and vortices can sporadically concentrate a steady ocean swell to create unusually large waves. The current or eddy field acts like an optical lens to focus the wave action..." Maybe so, but this article admits at the outset that solitary rogue waves may occur in calm seas. (Peterson, I.; "Rough Math: Focussing on Rogue Waves at Sea," Science News, 150:325, 1996) Reference. Large solitary waves are rather common. See GHW1 in our Catalog: Earthquakes, Tides. Ordering information can be found here . From Science Frontiers #109, JAN-FEB 1997 . 1997-2000 William R. Corliss ...
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... signals consisted of a fundamental tone and evenly spaced harmonics. Sometimes, the fundamental tone rose and fell. This "natural trombone" was thought to be a gas-filled subterranean cavity capped at the top by rock, with a pool of magma at the bottom. Volcanic vibrations resonated in this chamber. As the magma pool rose and fell, the fundamental tone changed. More recently, a network of seismic stations in French Polynesia has picked up more mysterious seismic signals. These differ from those in Java in that each fundamental tone is "pure"; that is, there are no harmonics. Dubbed "T -waves," the sounds originated from an active volcanic ridge in the South Pacific. Suspicion fell on one flat-topped volcano that rose to within 130 meters of the ocean surface. But, how could this peak generate such a pure tone? The theory is that the active volcano spews out a column of steam bubbles bounded at the bottom by the flat volcano and by the ocean at the top. Computer simulations proved that sound could resonate in a column of bubbles just as it does in an organ pipe. Since the height of the column remains fixed, so does the fundamental tone. Certainly harmonics are generated, too, but the bubbles damp out the higher frequencies, leaving a pure tone. (Schneider, David: "A Blue Note," Sci entific American , 277:18, August 1997.) Comments. The resonating-bubble-cloud theory was proposed in a 1996 issue of the Bulletin of the Seismological Society of America. ...
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... Science Frontiers ONLINE No. 112: Jul-Aug 1997 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects The Kind Of Fault You Like To Find Earthquakes are concentrated along the boundaries between tectonic plates where oceanic plates dive under continental plates. Stresses naturally accumulate during such slow-motion collisions. The result: plenty of quakes. Mechanically, this model is very appealing, but there are puzzling exceptions. There are sections along plate boundaries obviously in collision where no earthquakes at all occur to relieve stresses. Quakes are felt on either side of these segments, but all is serene inside. These segments are termed "seismic gaps." They may stretch for hundreds of kilometers. Theory insists that all seismic gaps must eventually be filled in. After all, the rocks can take only so much stress. Theory may be wrong because at least ten seismic gaps seem to be permanent. Something unexplained is transpiring beneath the surface that allows oceanic plates to slide quietly down under the continents and deep into the mantle. One such permanent seismic gap is especially embarrassing to geophysicists. It stands out prominently on earthquake maps of the very active Peruvian coast. When the immense quake of 1974 shook this coastline, this gap was unperturbed. Neither did the many aftershocks violate this charmed region. Not believing in subterranean magic, some geophysicists confidently (and very loudly) predicted this reluctant gap would soon yield. After 23 years it is still there! (Penvenne, Laura Jean; "When It's Better to Build on the Fault," New ...
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... Issue Sourcebook Project Sourcebook Subjects Anthropology Unbound When careful dating at the Monte Verde site in Chile finally smashed the Bering Strait paradigm (SF#112), it was if science had been unchained. Ideas and data that have long been suppressed in fear of professional retribution are now appearing. At the February 1998 annual meeting of the American Association for the Advancement of Science (AAAS) in Philadelphia, anthropological heresies ran rampant. T. Dillehay, who directed the Monte Verde work, declared that there were 15-20 other South American sites older than 11,500 years. Monte Verde itself may have been founded 33,000 years ago. D. Stanford, Smithsonian curator of archeology, opined that there were probably several waves of prehistoric immigration into the Americas across the Arctic, the Pacific Ocean (! ), and possibly even the Atlantic (! !) . [This is heresy no longer.] Supporting early Atlantic crossings are several dozen artifacts found in the eastern U.S . that closely resemble some found in France and Iberia. Stanford said, "We don't know yet what that means." Studies of DNA diversity among New World Indian populations find such large differences that at least 30,000 years would have been needed for these differences to develop. (Assuming, of course, a relatively homogeneous group of initial colonists.) Linguist, J. Nichols, from Berkeley, sees a similar diversity in the languages of New World peoples. Some 140 language families -- half the world total -- are found in the Americas. Nichols estimates ...
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... Science Frontiers ONLINE No. 108: Nov-Dec 1996 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects A Blue Flash Green flashes occasionally appear when the sun (or moon or Venus or Jupiter) sink below the horizon. Blue flashes are much rarer but still well-recognized phenomena. An example of the latter was observed in 1995 on the Indian Ocean. August 11, 1995, Bay of Bengal. Aboard the m.v . Repulse Bay enroute Jeddah to Port Klang. "Prior to sunset the vessel was proceeding due east across the Bay of Bengal and it was quite apparent that the sun was still very bright and had not taken on its usual darkorange or red appearance; even with half its diameter above the horizon, the sun was much too bright to view directly. As the last segment of the sun dipped below the horizon, a blue 'horn' formed at each end of it, as shown in sketch (a ), and these then closed up to form a bright-blue arc, as shown in sketch (b ). " (Leslie, A.J .; "Blue Flash," Marine Observer, 66:115, 1996) Comment. The blue flash is a shorter-wavelength version of the green flash. The basic phenomenon is explained in terms of dispersion of the sun's spectrum by the atmosphere near the horizon. Even so, many enigmas remain about these low-sun phenomena. There have been observed: multiple flashes, flashes preceding sunset, complex flash ...
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... Science Frontiers ONLINE No. 120: Nov-Dec 1998 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Gaia as a super-superorganism The Gaia hypothesis states that the earth's environment is maintained suitable for life by life itself. Our climate, atmospheric oxygen level, ocean composition, and similar vital conditions are kept livable by life's waste products, such as the oxygen emissions of plants. That something like Gaia is required is seen in the extreme disequilibrium of the earth's atmosphere compared to the near-equilibrium of the atmospheres of apparently lifeless Venus and Mars. For example, our atmosphere's 21% oxygen, a highly reactive gas, is many orders of magnitude higher than one would expect on a lifeless planet. Furthermore, life-friendly conditions have been maintained for billions of years despite large changes in the sun's output and the traumas of asteroid impacts. T.M . Lenton, writing in Nature, asks a salient question: How has planetary self-regulation (Gaia) been established and maintained by evolution and natural selection which operate on the level of individuals? In other words, evolution tells us that organisms should evolve so as to leave the most progeny not so as to regulate the atmosphere. Lenton answers that there must be feedback loops from the planetary environment that steer the evolution of individuals in the "proper" direction. Lenton goes on to explore some of these many feedback mechanisms; one obscure loop involves the production of dimethyl sulfide by marine phytoplankton. Truly, it ...
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... Science Frontiers ONLINE No. 121: Jan-Feb 1999 Other pages Home Page Science Frontiers Online All Issues Last Issue Next Issue Sourcebook Project Sourcebook Subjects Contents Archaeology Problems of aboriginal art in australia A CONTINENT LOST IN THE PACIFIC OCEAN Astronomy Oklo: an unappreciated cosmic phenomenon Is life a transitor phenomenon? Biology Acupuncture 5,200 ears ago? Imprison willy! Is intelligence a deadly pathogen? How homeopath might work October 5, 1998: dark day for homing pigeons Starlings fall out of the sky Geology An arkansas tsunami deposit? Fused ancient garbage dumps Geophysics Tunguska afterglow Lake champlain's two seiches B-24 SIGHTS "CIRCLES OF LIGHT" Psychology Are pets psychic? ...
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... Science Frontiers ONLINE No. 118: Jul-Aug 1998 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Unidentified Light May 4, 1997. North Atlantic Ocean. Aboard the s.t .s . Astrid enroute from the Azores to Dartmouth. "At 0443 UTC a light was sighted high in the sky above the ship. The light was of the style of a satellite in appearance. However, it was seen for about 10-15 seconds moving west to northwest, with a pulsating white light. In addition, it was moving very fast and it also stopped dead a couple of times. "At one point, the light stopped and turned in the direction of the ship. The light no longer pulsated, and for about one second it was in the form of a spotlight lighting the surrounding area. The light then turned back again and moved very, very fast across the sky before it was lost below the horizon in a matter of seconds." (Ulrich, G.; "Unidentified Light," Marine Observer, 68:64, 1998.) Comment. The erratic motion and use of a searchlight are typical of some of the UFO reports seen in newspapers. However, the Marine Observer is a publication of the UK Meteorological Office. In the above "encounter," aircraft, satellites, and meteors do not fit the testimony of the observers. From Science Frontiers #118, JUL-AUG 1998 . 1998-2000 William R. Corliss ...
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... Science Frontiers ONLINE No. 107: Sep-Oct 1996 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects More Sparks On The Beach Sharp eyes often pick out unusual phenomena in very usual places. From California, A. Hastings writes: "I also had an experience with 'Sparks on the Beach' as in SF#104/4 . This was on the Pacific Ocean Beach at San Gregorio, south of San Francisco, several years ago. I was walking on fairly wet sand, just above the tide line. As I stepped, the sand around my feet lit up with small bright dots of phosphorescence. I would not have said that the color was blue, but it could have been like blue-white, like the star Rigel. I found that if I stepped hard or stamped my foot, the lights flashed brighter and the lit area went out farther from my foot. I could see the movement expanding out. After a stamp or two, they did not light up as much. I assumed that this was caused by some organism that lit up when it felt pressure, and 'wore out' after it had done this a few times -- a refractory period probably occurred." (Hastings, Arthur; personal communication, March 21, 1996) Comment. This is probably a pressureinduced biological phenomenon, but we have no idea what kind of organism produces the lights. Footsteps do produce a rapidly expanding pressure wave on damp sand, which whitens the sand as it moves outward. But we ...
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... Science Frontiers ONLINE No. 121: Jan-Feb 1999 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects An Arkansas Tsunami Deposit?Yes, Arkansas is hundreds of kilometers from any ocean. Could a tsunami ever reach Little Rock, or even 120 kilometers northeast of Little Rock where, atop a 76-meter (250-foot) hill are perched giant blocks of sandstone. These blocks range up to 7.6 meters (25 feet) in size and weigh many tons. No native rocks in the area match them. The Ice Age glaciers never reached Arkansas, so they can't be glacial erratics. Where did they come from? One clue is the presence of glauconite in the sandstone. Glauconite is common in marine rocks, so suspicion points toward the Gulf of Mexico. Geologist G. Patterson, University of Memphis, thinks that the huge chunks of sandstone came from coastal Louisiana and were carried some 650 kilometers (400 miles) inland by the giant tsunami raised by the asteroid or comet that smashed into the Yucatan to close out the Cretaceous. That, of course, was when the dinosaurs were forced into oblivion. But could the tsunami really have transported such huge rocks 650 kilometers? (Falk, Dan; "Washed Up," New Scientist, p. 26, November 7, 1998.) Comments. Tsunami debris from the end-Cretaceous impact has been found along the Gulf Coast and on some Caribbean islands. In northeastern Mexico, geologists have found a debris layer 3-meters thick that ...
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... Science Frontiers ONLINE No. 110: Mar-Apr 1997 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Unusual Circulating Cloud Object July 24, 1996. Malborough, South Devon. About midnight on this date, E. Netley and his wife observed a most peculiar cloud formation. It was so well-formed and precisely organized that Netley felt that the term "cloud object" was appropriate. Even so, he was confident that the apparition represented a natural phenomenon. "Natural" probably, but certainly the strangest cloud we have encountered in 30 years of literature research. The evening of July 23 was warm and a bit humid, with a modest breeze blowing in from the ocean. Netley and wife first saw the "cloud object" from a distance of about a kilometer; they eventually walked to within 400 meters of the phenomenon. The "object" consisted of a slowly rotating ring of thin, vertically oriented clouds. (See figure.) The cloud ring was 80-100 meters across and seemed to rotate in a horizontal plane at the rate of about one revolution per minute. As though this were not strange enough, the rotating "cloud object" itself moved in a larger circle 8-10 times the diameter of the "cloud object." The "cloud object" took 4-5 minutes to complete a trip around the larger circle. The phenomenon lasted for about an hour before dissipating. (Netley, Edward; "Unusual Circulating Cloud Object," Journal of Meteorology, U.K . ...
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... Science Frontiers ONLINE No. 117: May-June 1998 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Rare North Atlantic Light Wheel April 30, 1981. North Atlantic Ocean. "At exactly 2155 GMT, a white seasmoke type mist was observed glowing white between 2 and 5 metres above the sea surface. Further observation revealed that we were entering a large area of circulating bioluminescence of defined spiral form which appeared to be a pale emerald green in colour. Although the direction of rotation and the centre hub of the wheel could not be determined, the bands appeared to be of great dimension. While still proceeding through the bioluminescence and observing astern, it was noted that the formation of the bands became disrupted and seemed to diffuse a ragged appearance at the perimeter of the wheel to the port side of the vessel. Judging by the distance of the vessels close by -- which were being tracked by radar -- the extent of the rotating bands to the west could not be determined but they were estimated to be between and n. mile. The duration of the phenomenon was 4 minutes from entering to leaving the bioluminescence." (Lehepuu, K.; "Bioluminescence," Marine Observer, 52:76, 1982.) Comment. Bright marine bioluminescence is not uncommon in the Atlantic, particularly in warm waters, but it is very unusual to find geometrically organized displays. The light wheels seen in the Persian Gulf and South China Sea are more frequent and more highly structured. No one has ever come up with a ...
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... Science Frontiers ONLINE No. 118: Jul-Aug 1998 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Astounding Undersea Structure Near Okinawa "A structure thought to be the world's oldest building, nearly twice the age of the great pyramids of Egypt, has been discovered. The rectangular stone ziggurat under the sea off the coast of Japan could be the first evidence of a previously unknown Stone Age civilization, say archeologists." Wow! Is this true? This so-called "structure" is 600 feet long and 90 feet high. Said to be about 10,000 years old, it obviously predates the edifices of the ancient Egyptians and Babylonians. The "structure" is now under about 75 feet of ocean near a small island named Yonaguni southwest of Okinawa. During the Ice Ages, it would have been exposed, just like the Bering Land Bridge to the north. Of course, the crucial question is: Is it really artificial? R. Schoch, the Boston University geologist who vouches that the Sphinx is also about 10,000 years old (SF#79), described the "structure" as a series of huge steps about 1 meter high. Schoch is impressed by the regularity of the steps, but does not discount a natural origin. A photo taken by divers does reveal a remarkably regular, stepped surface, but nature can be very methodical on occasion. Adding to the artificiality of the "structure" is the claim that a "road" encloses it. (Barot, Trushar; ...
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... be forced if just a small portion of the gases frozen under the sea floor were released into the atmosphere. Gas-hydrates are unimpressive when brought to the surface -- just dirty, fizzy ice. However, taken together, they contain more carbon than all the world's oil fields, perhaps much more. Most estimates fall between 1,700 and 11,000 billion tons, but there is one scientist who pegs these cold-storage carbon deposits at 4,100,000 billion tons. In comparison, human releases of carbon to the atmosphere via the burning of wood, gas, coal, and even the collective flatulence of all the planet's animals are trivial. Geological evidence confirms that past climate swings were associated with large injections of carbon into the atmosphere and oceans. A major contributor to these "carbon burps" may be decomposing methane hydrate. Until recently, climatologists have questioned the sizes of gas-hydrate deposits, but cores extracted from the Blake Ridge off the Carolina coast confirm the immense amounts of gases precariously locked up in sea-floor sediments. The stratum of gas hydrates in the Blake Ridge alone covers 26,000 square kilometers -- enough gas is there to supply the U.S . for 107 years. In biological terms the Blake Ridge's carbon is equal to 7% of the carbon locked up in all terrestrial biota -- animals, trees, grasses, etc. And the Blake Ridge gas hydrates represent a miniscule fraction of the planet's frozen gas hydrates. (Dickens, Gerald R., et ...
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... . Weak though it may be, gravity controls the trajectory of a baseball, the motion of the planets, and the shape of our Galaxy. Physicists describe gravitation with Newton's Law of Gravitation, which incorporates the Gravitational Constant G. Here's where the embarrassment arises. Many other constants of nature, such as the charge on the electron, are known to eight significant figures. We only know G to three. What's worse, modern attempts to refine the measurement of G come up with wildly different answers. Torsion-pendulum experiments in the U.S ., Germany, and New Zealand are far apart in their G-measurements. And physicists are perplexed -- to put it mildly. Of course, G is hard to measure. Seismic waves from ocean surf hundreds of miles away can affect the experiments. If a colleague a few offices away brings in some boxes of books for his library, the experiment is compromised. Better instrument science may eventually resolve the too-large discrepancies between the measured values of G, but some physicists worry that perhaps the problem runs deeper. "If experiments find that G is changing slowly over time, for example, physicists would have to rethink how space and time are stitched together in a single fabric. Einstein would groan in his grave." (Kestenbaum, David; "The Legend of Big G," New Scientist, p. 39, January 17, 1998.) From Science Frontiers #116, MAR-APR 1998 . 1998-2000 William R. Corliss ...
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... . Why don't they evaporate in the sunlight and near-vacuum of outer space? Perhaps, thought Frank, they are protected by a thin coating of carbon. (Roylance, Frank D.; "Space Snowballs Theory Gains Credence," Baltimore Sun, May 29, 1997. Also: Monastersky, R.; "Is Earth Pelted by Space Snowballs?" Science News, 151:332, 1997. Thanks to all who sent in clippings. There are too many to mention here. Frank's photos also appeared on some national news programs.) Comments. We have already mentioned the minicomets several times in SF. See SF#60/275, for example. If verified, icy minicomets might well be the source of some of the earth's ocean water. Perhaps they are related to those strange "nebulous" meteors (SF#86/75) and noctilucent clouds. An intense 40day minicomet "storm" might be useful in accounting for certain historical floods!! From Science Frontiers #112, JUL-AUG 1997 . 1997-2000 William R. Corliss ...
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... 151:279, 1997.) Once we learn how to measure neutrinos really well, we can start looking for intelligent signals impressed upon them by advanced extraterrestrial civilizations. W. Simmons and colleagues at the University of Hawaii at Manoa point out that neutrinos are much better than electromagnetic waves for galaxy-wide communication. They are not blocked by dust nor are they smeared out by ionized gas. Any civilization clever enough to colonize the entire galaxy would want to send out neutrino signals if only to keep clocks in far-flung star systems synchronized. Simmons et al calculate that a neutrino detector containing a cubic kilometer of seawater could probably detect neutrino signals from artificial sources located within 3,000 light years of earth. A detector that might be able to do this is being installed in the ocean off the Hawaiian Islands. Naturally, it has an acronym: DUMAND = Deep Underwater Muon and Neutrino Detector. (Chown, Marcus; "Do ETs Phone Home with Neutrinos?" New Scientist, p. 19, December 3, 1994.) Reference. The problem of the missing solar neutrinos is discussed at length in Section ASF3 in our Catalog The Sun and Solar System Debris. For ordering information, visit here . From Science Frontiers #112, JUL-AUG 1997 . 1997-2000 William R. Corliss ...
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... North Atlantic drawn between 1960 and 1988. It therefore seems clear that something unusual is going on in the North Atlantic. One would suspect increased winds, but velocities measured at Seven Stone have remained constant while wave heights rose. It is concluded that the bigger waves are not generated by local winds; rather, they are swells that have been created thousands of miles away. The cause of these larger swells now affecting the entire North Atlantic is not known. The authors of this paper are forced to conclude with: "It should be noted that so far it has not been possible to attribute the observed change to either an anthropogenic cause or to natural climate variability on decadal time scales." (Bouws, E., et al; "The Increasing Wave Height in the North Atlantic Ocean," American Meteorological Society, Bulletin, 77:2275, 1996.) Reference. Other unusual wave phenomena are cataloged in Chapter GHW in our Earthquakes, Tides. For information on this volume, go here . Atlantic wave heights, 1960-1988. 1, 10, 50 percentiles. From Science Frontiers #113, SEP-OCT 1997 . 1997-2000 William R. Corliss ...
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... telestomping elephants mentioned under BIOLOGY can detect these quiverings. That the earth does indeed "ring" is old news. Geophysicist A.E .H . Love mentioned the possibility in 1911. It is also recognized that large earthquakes can set the earth to ringing (" quivering" is better). What is news is the discovery by N. Suda et al that our planet rings even when no major quakes are occurring, and no one yet knows why. Suda et al write: "The observed "background" free oscillations represent some unknown dynamic process of Earth." Suda and his colleagues detected these oscillations using a superconducting gravimeter, which they installed in a seismically-quiet place: Antarctica. The favorite explanation for the background oscillations is turbulence in the earth's atmosphere. Ocean tides and currents are also on the list as potential "bell-ringers." [El Ninos were not mentioned!] (Suda, Naoki, et al; "Earth's Background Free Oscillations," Science, 279: 2089, 1998. Also: Kanamori, Hiroo; "Shaking without Quaking," Science, 279:2063, 1998.) From Science Frontiers #118, JUL-AUG 1998 . 1998-2000 William R. Corliss ...
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... complimentary movies, too. They are usually portrayed as gentle, intelligent, human-friendly marine mammals that dine only on fish. Lately, though, we have been reading that Alaskan killer whales have been snacking on those cute little sea otters. Much more devastating to the killerwhale image is an article in Natural History describing the vicious attack of a pack of killer whales on a pod of much larger sperm whales 70 miles off the California coast. To ward off the attack, nine sperm whales had formed a rosette, heads together, with their powerful tails splayed outwards towards the enemy. The killer whales circled the sperm whales ominously. Every so often, one would dash in and tear off a huge chunk of blubber. Eventually, all nine sperm whales floated dead or dying in an ocean of blood. The "gentle-giant" portrait of the killer whale is tarnished further in the Antarctic where they habitually dine on the lips and tongues of minke whales, then leave them to die. (Pitman, Robert L., and Chivers, Susan J.; "Terror in Black and White," Natural History, 107:26, December 1998/January 1999.) Comment. How will the media spin-doctor stories like these? Killer whales didn't get their name because they ate fish alone. From Science Frontiers #121, JAN-FEB 1999 . 1999-2000 William R. Corliss ...
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... Science Frontiers ONLINE No. 120: Nov-Dec 1998 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Acoustical "vision" underwater When we (and all eyed animals) see an object, we are detecting light reflected from that object. When underwater, though, our vision is limited because light does not travel far. Sound, however, does; and sound is reflected from objects just as light is. This is of course the basis of underwater sonar, in which a sound source replaces the sun or a diver's floodlight. But even without an active sound source, the ocean is full of sound. Waves, rain, and the sounds made by marine animals create a background of noise that "illuminates" objects, not directly, but from the environment in general. Using only this enveloping background sound, it is possible to create acoustical images of objects. "Vision" of this sort is equivalent to "facial vision" in blind humans, who can hear objects using the environmental sound reflected from them. J. Potter and his colleagues at the National University of Singapore have constructed an array of underwater microphones that detects "slices" of the acoustical environment around it. When processed by a computer, images of objects emerge by virtue of the background noise reflected from them. This group has also estimated the ability of dolphins to detect and process background noise. They suggest that dolphins should be able to "see" objects at least 25 feet away without even using their active sonar; that is, ...
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... charcoal in clay-lined pits and humanfractured pebbles. This sedimentary layer is carbon-dated at 33,000 years ago -- some 20,000 years before the ancestors of North America's Clovis people are said to have trekked across the Bering land bridge. (Wilford, John Noble; "Chilean Field Yields New Clues to Peopling of Americas," New York Times, August 25, 1998. Cr. M. Colpitts) New Clues. Just to the north of Monte Verde, on the coast of southern Peru, traces of a hitherto unknown, 11,000-year-old maritime culture have emerged. For short, the new site is called QJ-280 (for Quebrada Jaguay 280). QJ-280 is now about 2 kilometers inland from the Pacific Ocean. But 11,000 years ago, sea levels were lower, and it was 7-8 kilometers inland. This site is littered with the bones of fish and marine birds, such as cormorants. The people of QJ-280 were obviously familiar with the sea and exploited it almost exclusively. Whence this maritime culture? Did they come down the coast from North America or across the wide Pacific? Further, the OJ-280 site has yielded obsidian, which could only have come from the highlands 130 kilometers to the east. Did the QJ-280 mariners penetrate that far inland, or did they trade with an unrecognized highland culture? Finally, equally old Paleoindian sites have been researched by A. Roosevelt in the lowlands near the Atlantic coast -- a continent away. ...
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... Science Frontiers ONLINE No. 118: Jul-Aug 1998 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Broadside Against Small Icy Comets In a late-1997 issue, Geophysical Research Letters published a group of five papers that detailed five different lines of evidence that are inconsistent with the claim by L.A . Frank and J.B . Sigwarth that the earth is bombarded daily by 30,000 house-size icy comets. If such bombardment has really been occurring, scientists would have to rethink the origins of the earth's oceans, terrestrial life, and the formation of the solar system. No wonder the icy-comet hypothesis is strongly challenged! Three of the more interesting points made by this group of papers are as follows: Our moon could not escape the icy-comet bombardment. Roughly 1,000 craters 50 meters in diameter and splashes of debris 150 meters in diameter must occur each. There is no evidence that the moon is thus afflicted. Comets also carry the noble gases argon, krypton, and xenon. These gases should accumulate in the atmosphere as the comets disintegrate. The amounts of these gases actually measured are 10,000 times less than those the postulated bombardment would produce. The icy comets should break up near the earth and produce clouds of ice crystals. Sunlight reflected from such 30-ton clouds would be brighter than Venus and easily visible before they disperse. Such objects are rarely seen, implying that small icy comets do not exist in the numbers claimed. Preceding this series of five ...
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... deep dives (over 1,000 meters) are also inimical to human instrumentation. But S.J . Morreale's group at Cornell have succeeded in attaching pressure-resistant transmitters to the shells on short tethers. This team was able to track female leatherbacks as they left their nesting beach in Costa Rica and headed southward, past the Galapagos, out into the open South Pacific. Surprisingly, all the leatherbacks plied a very narrow corridor each year of the experiment (1992-1995). In fact, the paths were almost for at least 2,700 kilometers southwest of the Galapagos. Highprecision navigation equipment is required here. Among the leatherbacks' "instruments" are probably sensors that detect the angle of the geomagnetic field, the length of daylight, and the identities of the oceanic currents encountered. There are probably other sensors and, of course, a brain to process all the signals; but virtually nothing is known about them. (Morreale, Stephen J., et al; "Migration Corridor for Sea Turtles," Nature, 384: 320, 1996. Also: Monastersky, R.; "Do Sea Turtles Stop and Ask for Directions?" Science News, 150:342, 1996.) Rectal gills. Sea turtles are airbreathers that make long, deep dives. To descend deep for long periods, they have evolved a diving adaptation radically different from that employed by the dolphins, whales, and seals; namely, rectal gills. They breathe air at the front end and water at the rear. Water is pulled in through the rectum ...
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... , there is something puzzling about the northern plains. We now have information from the Mars Global Surveyor (MGS), now orbitting the red planet, that the low-lying northern plains are much flatter than thought. For thousands of kilometers, they are smooth on a scale of hundreds of meters. This is flatter than the lava flows of the lunar maria; flatter than the smoothest central Sahara. These startling data come from the MGS's laser altimeter that can measure elevation of the terrain below it with 10meter accuracy averaged over the beam width of 150 meters. The only known terrain in the entire solar system that can match this flatness is the abyssal, sediment-filled floor of the South Atlantic. Hmmm! Does this imply that the northern plains of Mars were once an ocean floor? That's the favorite interpretation today. Of course, they might also be lava plains created by a colossal ancient impact, made smoother by blown dust. (Kerr, Richard A.; "Surveyor Shows the Flat Face of Mars," Science, 279:1634, 1998.) From Science Frontiers #117, MAY-JUN 1998 . 1998-2000 William R. Corliss ...
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... Science Frontiers ONLINE No. 96: Nov-Dec 1994 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Two really deep oceans During our latest anomaly-collecting cycle, we came across two reports on apparently identical phenomena. Neither article mentioned the work of the other! Both groups of scientists processed massive quantities of earthquake records to form "seismic images" of structures deep in the bowels of the earth. (The technique is called "seismic tomography.") Both groups have discerned huge slabs of crust that were once on the planet's surface but were subsequently thrust (" subducted") down under the continents. These slabs are now hundreds of kilometers below the surface, and they have dragged water along with them. In fact, their water inventories may rival today's surface oceans; they may even have been surface oceans themselves millions of years ago before they descended into the infernal regions. Only a few years ago, all geologists maintained that all water in subducted slabs was squeezed out of the rocks by immense pressure and later reappeared at the surface as volcanic steam. Deep ocean #1 . G. Nolet and A. Zielhuis, Princeton seismologists, report a huge reservoir of water about 900 kilometers under present-day Europe. Some 400-500 million years ago, there was an ocean in this locale. (Zimmer, Carl; "The Ocean Within," Discover, 15:20, October 1994.) Deep ocean #2 . H. Wysession, Washington University, has located a water ...
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... Science Frontiers ONLINE No. 97: Jan-Feb 1995 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects The 627-foot water slide between australia and india The world ocean, when viewed close-up from ship or airplane, displays the familiar microstructure of waves and currents. The view from a satellite, thousands of miles up, is startling to say the least. Huge bulges hundreds of feet high and hundreds of miles in extent appear when satellite radar altimeter data are plotted. Equally large depressions in the ocean surface also show up -- none obvious to surface observers. This unexpected macrostructure of the ocean surface is shaped by variations in the strength of the earth's gravitational field and sea-bottom terrain. Wherever the gravitational field is stronger, it creates a depression on the fluid surface. German geophysicists, in fact, have drawn a global map of the ocean's large-scale topography, as measured from the European Space Agency's ERS-1 satellite. The surface of the world ocean departs wildly from a smooth sphere. On their colored map: "Brilliant pink and red areas are continental-size mounds of water most notable northeast of Australia, where the sea topography is up to 85 meters (280 ft.) higher than the standard ocean level. Just to the west near India, deep blue indicates a 105-meter (346-ft.) deep depression in the sea surface. Major differences in the gravity fields and terrain underlying the two regions cause a variation of 190 meters ...
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... Science Frontiers ONLINE No. 93: May-Jun 1994 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Marine Snow The marine analog of the high-altitude U2 used to collect interplanetary dust is the scuba diver armed with small jars and syringes. In these, marine biologists, such as A. Alldredge, collect the tiny bits of debris drifting downwards from the ocean's upper layers. This is the "marine snow." Its constituents are mainly: ". .. the tiny leftovers of animals, plants, and non-living matter in the ocean's sun-suffused upper zones. Among these particles are chains of single-celled plants called diatoms, shreds of zooplankters' mucous food traps, soot, fecal pellets, dust motes, radioactive fallout, sand grains, pollen, and pollutants. Microorganisms also live inside and on top of these odd-shaped flakes." Marine snow is everywhere in the ocean. Sometimes, it reaches blizzard proportions, and divers cannot see beyond a few feet. Measured in millimeters, the marine snowflakes are much larger than the average interplanetary dust particles (but of course interplanetary dust itself is also a constituent of marine snow). The bigger marine snowflakes -- over 0.5 mm -- are a major food source for deep-sea denizens waiting below for this manna from the watery heaven. The reason for mentioning marine snow in Science Frontiers is that biologists like Alldredge are really pio-neering new territory, where new anomalies must surely dwell. "' ...
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... ONLINE No. 97: Jan-Feb 1995 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Rubber Duckies Chase Nike Shoes Across Pacific Remember that amusing item in SF#84 about the 80,000 Nike shoes that were lost overboard in the Pacific in 1991? These shoes washed ashore months later in Canada and Alaska, carried thousands of miles by prevailing currents. Well, it's happened again. This time, eleven steel containers fell off a cargo vessel in the North Pacific near the International Dateline. The containers released 29,000 bath toys: duckies, turtles, froggies, and beavers. Ten months after the spill (January 10, 1992), the first yellow duckies washed ashore in Canada. These spills are useful in charting ocean currents but, except for wry Fortean content, are of little import to anomalists. However, there is one prediction of the computer models that is worth noting: Some of these bath toys may make it through the Bering Strait, across the Arctic Ocean, down past Greenland, and onto Atlantic shores. So, keep your eyes open at the beach! (Anonymous; "Rubber Ducky Armada Crosses Pacific," Science News, 146: 254, 1994. Carlton, Jim; "Tub Toys Are Ducky Ocean Researchers," Wall Street Journal, September 30, 1994. Cr. J. Covey) From Science Frontiers #97, JAN-FEB 1995 . 1995-2000 William R. Corliss ...
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... Science Frontiers ONLINE No. 98: Mar-Apr 1995 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Six Immense Armadas Of Icebergs Invaded The North Atlantic "Observations of large and abrupt climate changes recorded in Greenland ice cores have spurred a search for clues to their cause. The search has revealed that at six times during the last glaciation, huge armadas of icebergs launched from Canada spread across the northern Atlantic Ocean, each triggering a climate response of global extent." The foregoing abstract does not mention the interesting Heinrich layers that fostered the above scenario. In 1988, H. Heinrich published a paper describing a curious set of sedimentary layers found in cores drilled in the tops of the Dreizack seamounts in the eastern North Atlantic. Heinrich concluded that each of the six layers he found represented the melting of "six great armadas of icebergs." These icebergs carried debris picked up in Canada and, as they melted, deposited it on the seamounts and ocean floor. Each layer could be correlated with the major climate boundaries revealed by the Greenland ice cores. Very fittingly, these iceberg incursions are now termed "Heinrich Events." (Broecker, Wallace S.; "Massive Iceberg Discharges as Triggers for Global Climate Changes," Nature, 372:421, 1994.) From Science Frontiers #98, MAR-APR 1995 . 1995-2000 William R. Corliss ...
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... Science Frontiers ONLINE No. 100: Jul-Aug 1995 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Giant sea-bed pockmarks [The following long, initially dull (? ) discussion leads unerringly to the Bermuda Triangle via a Fortean phenomenon!] Unrecognized until just a few years ago (SF#100*), sea-bed pockmarks are remarkable geological features. They occur worldwide on the floors of all of the oceans and even some lakes. They are found in shallow waters and at depths of thousands of meters. In diameter, these roughly conical depressions may span 350 meters or more and be up to 35 meters deep. No trivial phenomenon, some pockmark fields exceed 1,000 km2. Like the curious abyssal ridges (SF#97), sea-bed pockmarks are rarely discussed despite their great geological and economic importance. Recent issues of Geology contain three fascinating papers relating to giant sea-bed pockmarks. In Ref. 1, J.T . Kelley et al describe a pockmark field in Belfast Bay, Maine. Here, the density of the pockmarks reaches 160 per km2, and they are apparently the largest pockmarks yet discovered. The Belfast Bay field is "fresh" and "active" in the sense that the pockmarks are sharply defined and methane bubbles still stream up from buried organic matter. Natural-gas plume rising from the sea-floor off the Carolina coast. Another pockmark field is the subject of P.R . Vogt et al (Ref. 2). It occupies a ...
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... Science Frontiers ONLINE No. 99: May-Jun 1995 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects 90-DAY SEA-LEVEL OSCILLATION AT WAKE ISLAND Most North Americans are familiar with rather powerful diurnal tides. The oceans, however, also move in ponderous cycles that beachcombers can never appreciate. Thanks to data from Geosat's precision altimeter, geophysicists can now discern some of these long-period moving patterns on the oceans' surfaces. "Energetic 90-day oscillations of sea levels have been intermittently observed at Wake Island in the western tropical Pacific during the past 2 decades. The oscillations tend to occur about 1.5 years after El NinoSouthern Oscillation events, to have amplitudes of 10-15 cm, and to persist for about 1 year. Sea-surface heights from the Geosat altimeter are used to establish that these signals take the form of Rossby waves and have an energy source near the Big Island of Hawaii, which lies 40 of longitude to the east. Sea-level and upper-layer currents from an eddy-resolving numerical model are examined and suggest that the energy source is eddies generated off the Big Island of Hawaii. These eddies appear to be associated with westward currents that intermittently impinge on the island." (Mitchum, Gary T.; "The Source of 90-Day Oscillations at Wake Island," Journal of Geophysical Research, 100:2459, 1995.) Comment. Such eddies would have to persist for long periods to survive the long trip to Wake Island some 2500 miles ...
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... 1995 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects The earth's most common topographical feature: abyssal hills Typical depth profiles revealing the dimensions of the abyssal hills; the earth's most common but least understood terrain. All of the continents put together do not cover even half the area occupied by the abyssal hills, which dominate 60-70% of our planet's surface. We hear a lot about the endless steppes of Asia and the immensity of the Sahara, but who writes about the earth's dominant geomorphological feature? The abyssal hills are left out of the textbooks because so little is known about them. They are hidden under 3 kilometers of water. Individual abyssal hills rise 100-2 ,000 meters from the ocean floor; they are about 7-15 kilometers across; their lengths are not well known. We know them mainly from fathometer readings. If we could see them visually, they would probably look like the Appalachians from an airplane; that is, wash-board-like. Although heavily draped with pelagic sediments, the abyssal hills are believed to have been shaped by faulting and volcanic activity. K. MacDonald and coworkers at the University of California, Santa Barbara, now believe that both processes are involved: "On the basis of data obtained last January on a series of dives along the East Pacific Rise (EPR), a ridge that runs off the coast of Central and South America, researchers theorize that the linear ridges of abyssal hills, which decorate the ocean floor somewhat ...
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... a deep green line 10 kilometers wide and stretching for hundreds of kilometers across the azure Pacific? Sailors have remarked on this line as their ships clove it. It is so large that astronauts on the Space Shuttle Atlantis have photographed it from hundreds of kilometers up. Sample analysis proves the green line to be a particularly dense concentration of phytoplankton, which thrives along the boundary where the North Equatorial Counter-current meets the colder South Equatorial Current. The microorganisms feed in the richer, cooler, sinking waters of the latter and then rise to the surface to create the green line. (Yoder, James A., et al; "A Line in the Sea," Nature, 371:689, 1994. Also: Adler, T.; "Microorganisms Create a Line in the Ocean," Science News, 146: 263, 1994.) Comment. Even more unusual lines may be created where oceanic currents meet. For example, in 1932 an immense congregation of sea snakes 10 feet wide and 60 miles long was observed in the Malacca Strait. (SF#4 ) From Science Frontiers #97, JAN-FEB 1995 . 1995-2000 William R. Corliss ...
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... Science Frontiers ONLINE No. 102: Nov-Dec 1995 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects From dust unto abyssal mud We know the Creator made at least one species from dust, but ocean-floor mud has turned out to have more biodiversity. Twenty years ago, biologists put the number of species at about 1 million. Then, they started shaking and gassing rain-forest canopies. The rain of new insect species that fell to the ground made them revise the estimate to 30 million. The latest, long-unappreciated reservoir of undescribed species is mud -- oceanic mud. In particular, we know that the mud in the Rockall Trench off the western coast of Scotland teems with untold species of diminutive nematodes. Of course, nematodes are not as pretty as birds and fish, but they are nevertheless bona fide species of life. Examination of the Rockall mud and that from other seabed sites has convinced the nematode counters that there may be as many as 100 million nematode species on our planet. When other classes of life are added, the figure rises to at least 130 million. (Pearce, Fred; "Rockall Mud Richer than Rainforest," New Scientist, p. 8, September 16, 1995.) Comments. Lifeless molecules can apparently unite to form an almost infinite array of life forms! The next reservoir of unexplored biodiversity may be the crevicular realm -- all those fluid-filled crevices and channels that extend miles down into the earth's crust. They are full of bacteria ...
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... Science Frontiers ONLINE No. 101: Sep-Oct 1995 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Dragon fish see red Most fish that make a living in deep, dark ocean waters have eyes that are most sensitive to the blue part of the sun's rays (470-490 nanometers). These are the rays that penetrate to the greatest depths in the sea. This adaptation to blue light means that deepsea fish have evolved visual pigments different from those of surface fish and land animals. Visual pigments are complex chemical compounds, and one must suppose that many, many random mutations took place before deepsea fish were able to manufacture visual pigments different from their relatives living near the surface. (Or did deepsea fish come first?) But there is more to this story. Many dwellers in the black abysses generate their own light. They sport bioluminescent organs so they can be seen by others of their own species and, in addition, illuminate prey for easier capture. In another remarkable example of evolutionary convergence, these bioluminescent organs emit light spectrally matching the eye sensitivity of deepsea fish! So far, though, this story is not any more amazing that many others woven into evolution's fabric. But suppose that a deviant species of deepsea fish upset this cosy status quo by evolving visual pigment and bioluminescent organs operating in a part of the electromagnetic spectrum that other deepsea fish could not perceive. It would be as if this species had radar but the others did not! Well, three genera of dragon fish do ...
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... Science Frontiers ONLINE No. 95: Sep-Oct 1994 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects A DEEP-SEA HYDROTHERMAL VENT INSTEAD OF A WARM LITTLE POND?If earth life didn't arrive from outer space (See under ASTRONOMY.), it may have arisen a couple miles below the ocean's surface at hydrothermal vents. The curious glows recently remarked at these vents (SF#87) have stimulated much speculation as to the potential role of these glows in the origin of life: "The history of hydrothermal activity predates the origin of life, and light in the deep sea has been a continuous phenomenon on a geological time scale and may have served either as a seed or refugium for the evolution of biological photochemical reactions or adaptations." We formally classify this item under GEOPHYSICS because scientists are still pondering how these glows are created. Some of the light is obviously black-body radiation from the very hot (350 C) water but: ". .. other potential, narrow-band sources of light may be superimposed on the blackbody radiation spectrum, including crystaloluminescence, Cerenkov radiation, chemiluminescence, triboluminescence, sonoluminescence, and the burning of methane in supercritical water." (Van Dover, Cindy Lee, et al; "Light at Deep Sea Hydrothermal Vents," Eos, vol. 75, 1994.) Comment. If cold, diffuse molecular clouds in deep space can synthesize glycine, imagine what the hot, chemically-rich fluids around hydrothermal vents might be able to do. ...
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... Science Frontiers ONLINE No. 96: Nov-Dec 1994 Other pages Home Page Science Frontiers Online All Issues Last Issue Next Issue Sourcebook Project Sourcebook Subjects Contents Archaeology That little "roman" head from precolumbian mexico The "kites" or "keyhole" structures of the middle east Astronomy On the sun, south is almost everywhere The moon: still partly molten? Lunar crater chains Biology Too identical! Why do flying fish have such colorful wings? "ADAPTIVE" MUTATION Electric snakes Geology Satellite spies strange stripes Two really deep oceans Geophysics The 536 ad dust-veil event Underwater thumps Remarkable straw fall Unusual lunar halo Psychology Psi phenomena and geomagnetism Physics Cold fission? Mathematics Lazzarini eats humble pi (posthumously) Unclassified A CURIOUS STRING OF COINCIDENCES Close encounters with unknown missiles ...
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... Science Frontiers ONLINE No. 96: Nov-Dec 1994 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Unusual Lunar Halo July 29, 1993. North Pacific Ocean. From the m.v . BP Admiral . "At 1045 UTC a large, very well defined and complete halo was seen around the 10-day-old moon. Vertical angles were taken by sextant while horizonal angles were found by gyro repeater. ". .. the area inside the halo was inky black with the inner edge of the halo being very clear cut and well defined; a 'spiked' effect was seen on the outer edge." (Ronald, J.M .; "Halo," Marine Observer, 64:105, 1994.) Comment. The angular diameter of the halo is normal, but the inky black interior is very rare. The same dark effect is sometimes seen between primary and secondary rainbows and has an acceptable explanation. However, the radial spokes are not accounted for by halo theory. From Science Frontiers #96, NOV-DEC 1994 . 1994-2000 William R. Corliss ...
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... and R.B . Hollander think that these coastal seiches are the consequence of internal waves (solitons*) formed at the southeastern edge of the Caribbean where tidal effects are particularly powerful 2 days after new and full moons. These slowmoving internal waves take 5 days to reach Puerto Rico, where they emerge as coastal seiches. Similar internal waves created by tidal currents at the edges of the continental shelves and deepwater sills may explain the mysterious coastal seiches recorded in the Anadaman and Sulu Seas. So far, no one has suggested origins for the Irish "death waves" and Baltic "seebars." (Korgen, Ben J.; "Seiches," American Scientist, 83:330, 1995.) *Internal waves or solitons move, mostly unseen at the surface, along the ocean's thermoclinethe plane separating warm surface water from much colder water below. The vertical amplitude of the solitons may be hundreds of meters, but at the surface they are represented by only small, gently domed, slowly moving waves or by regions of turbulence. Coastal seiches appear when the solitons impinge on coasts. For more on unusual waves and solitons, see: Earthquakes, Tides, etc. This book is listed here . From Science Frontiers #101 Sep-Oct 1995 . 1995-2000 William R. Corliss ...
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... cement, this theory seems questionable. Theory #2 . The head is truly of Roman origin and was transported to Precolum-bian Mexico from Southeast Asia by Chinese or Hindu voyagers. Theory 3. The author of the present article, R.H . Hristov, favors a Viking origin. The cap on the head and even the physiognomy have Norse overtones. The chronology is right, too, for the Vikings were exploring North America's east coast in the 11th century. Did they venture as far south as Mexico? Hristov points out: "It is well known that in this area very significant political-cultural perturbations occurred among the autochthonous civilizations between the 10th and 13th centuries AD. These were produced by a small group of white immigrants with beards who came from the Atlantic Ocean." (Hristov, Romeo H.; "The Little 'Roman' Head of Calixtlahuaja, Mexico: Some Reflections," NEARA Journal, 28:68, 1994. NEARA = New England Antiquities Research Association.) From Science Frontiers #96, NOV-DEC 1994 . 1994-2000 William R. Corliss ...
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... 1996 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Fossil Mantle Plume Under South America "In a challenge to a major aspect of the theory of plate tectonics, NSF-supported scientists have discovered the presence of an ancient conduit deep in the Earth's mantle beneath Brazil. "The conduit appears to have remained geographically fixed with respect to the overlying continent despite thousands of kilometers of South American plate motion. This observation runs contrary to a major tenet of plate tectonic theory -- that the motion of lithospheric plates is essentially independent of flow in the upper mantle beneath the plates -- and implies that the upper mantle and the overlying South American continent have remained coupled since the breakup of the Gondwanaland super-continent and opening of the South Atlantic
Ocean some 120 million years ago. This result also implies that large-scale convection in the mantle may be responsible for the motion of the great continental plates, such as South America, where the driving force for plate motion has not been well understood." (Dybas, Cheryl; NSFNEWS Digest 54, November 8, 1995. Cr. D. Swaner. NSF= National Science Foundation. The cyber-address for the NSFNEWS Digest is:
[email protected] The computerless may read more in: VanDecar, John C., et al; "Seismic Evidence for a Fossil Mantle Plume beneath South America and Implications for Plate Driving Forces," Nature, 378:25, 1995. From Science Frontiers #103, JAN-FEB 1996 . 1996-2000 William R
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... Science Frontiers ONLINE No. 96: Nov-Dec 1994 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Underwater Thumps "Scientists based on the central California coast are trying to identify the origin of a mysterious underwater sound that disturbed surfers and divers for three weeks -- and then just as mysteriously disappeared. "The sound, made up of thumps occurring at 10-second intervals, was compared by one diver to five or six giant bongo drums going off simultaneously. Most experts have concluded that it was of human origin." As usual in such cases, no governmental or military sources knew anything about the thumps. (Shurkin, Joel N.; "Underwater Thumps Baffle Ocean Scientists," Nature, 371: 274, 1994.) From Science Frontiers #96, NOV-DEC 1994 . 1994-2000 William R. Corliss ...
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... ignore data chauvinists) is that we should somehow use all the available information to infer the correct phylogeny. After all, there was just one real phylogeny that occurred in the past, and we want to find it as closely as we can." Comment inserted by the compiler. Van Valen is saying that three evolutionary Trees of Life can be drawn from adult morphology, DNA structure, and larval morphology, and that they may not look the same. Caterpillars may yield a family tree different from that inferred from the butterflies. Which is correct, or are they all correct? Back to the review. Waxing heretical, Williamson points out that an organism may have more than one phylogeny ! Larvae may have ancestries different from the adults. How heretical can one get? But in the ocean, spermatozoa often cannot find an egg of the correct species. They may then fertilize eggs of a distantly related species. In such "wide hybrids," the larvae may resemble one parent and the adults the other. There is much more. The gist of it all is that evolution has been much more than random mutation and natural selection. Hybridization and outright mergers (endosymbiosis) have played important roles. Even our own cells harbor mitochondria that have their own DNA. They are probably bacterial invaders that long ago settled down in the cells of our ancestors. (Van Valen, Leigh M.; "Anomalous Larvae and the Burning of Heretics," Evolutionary Theory , 10:279, 1994. Cr. K.L . Partain.) From Science Frontiers #100, ...
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... of impurities and curious microscopic structures. (See: "Diamonds Are an Anomalist's Best Friend" in SF#92.) The main constituent of diamonds is carbon, but even chemically pure carbon is contaminated in a sense. The contaminant is light carbon; that is, C12 , which is an isotope used preferentially by living organisms. Some diamonds, it is found, contain anomalously large fractions of C12, which suggests they have an organic origin. Some diamonds also contain sulfide inclusions that have sulphur-isotope ratios also symptomatic of a biological origin. The specific diamonds suspected to have an organic origin are the so-called "eclogitic" diamonds. These diamonds may have obtained their carbon and impurities from bacterial communities that once lived around hydrothermal vents that existed along ancient mid-ocean ridges. Subsequent metamorphism (heat and pressure) turned the masses of bacteria into eclogitic diamonds. So, those sparklers of yours may just be clumps of billion-year-old bacterial corpses! (Nisbet, E.G ., et al; "Can Diamonds Be Dead Bacteria?" Nature, 367:694, 1994.) Definition. Eclogites comprise a class of metamorphic rocks formed at extremely high temperatures and pressures. From Science Frontiers #95, SEP-OCT 1994 . 1994-2000 William R. Corliss ...
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... Science Frontiers ONLINE No. 91: Jan-Feb 1994 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Fiber Fall March 12, 1993, South Pacific Ocean, aboard the m.v . Alam Selamat . At 0630, as a frontal system passed the vessel, there was a sudden rain shower lasting about 25 minutes. Captain J.N . Gowrie reported: "As the rain began to dry on the warm decks, we noticed patches of what first looked like slime but after it had dried appeared to be wool or cotton. We send you a sample of the material and the facsimile chart of the relevant surface analysis, showing my additions of ship's position at the time as 41 43'S , 167 40'W , course 100 , speed 13 knots." (Gowrie, J.N .; "Raining -- Sheep?" Marine Observer, 63:199, 1993. This journal may be ordered from: The Stationery Publications Centre, P.O . Box 276, London, SW8 5DT, ENGLAND) Comment. Incomprehensible as it may seem, there really are falls of slime, jelly-like globs (pwdre ser), and "angel hair!" See GWP in our catalog Tornados, Dark Days. To order visit here . From Science Frontiers #91, JAN-FEB 1994 . 1994-2000 William R. Corliss ...
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... Science Frontiers ONLINE No. 91: Jan-Feb 1994 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Pizzaspermia!We got a good laugh from that report of a fall of frozen pizza in SF#90, but now the phenomenon has suddenly become more serious! At about the same time Sky and Telescope printed the frozen pizza item, Time had a cover story on the origin of life. It was in response to this story that M.D . Greene wrote the following letter to Time : "Forget bubbles, comets or ocean vents. Scientists should be looking at pizza for the answer. I can remember when my college roommates and I routinely created life every week in our refrigerator. My theory is that around 4.5 billion years ago, the earth was bombarded by intergalactic pizzas. These then provided the ideal breeding ground in which early organisms could thrive and later evolve." (Greene, Mark D.; "How Life Began," Time, 142:8 , November 1, 1993.) Comment. Charles Fort would certainly have chuckled over the near-simultaneous mentions of intergalactic pizzas in two diverse publications. A second report underscores the mystery presented by the unexpected diversity of life in the deep-sea ooze. J.D . Gage and R.M . May ponder in Nature : "Why there should be such exuberant biological diversity in an environment apparently lacking in the habitat complexity of, say, tropical rain forest -- whose species richness it might rival -- remains an enigma ...
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... Science Frontiers ONLINE No. 88: Jul-Aug 1993 Other pages Home Page Science Frontiers Online All Issues Last Issue Next Issue Sourcebook Project Sourcebook Subjects Contents Archaeology Egyptians in acadia? Voyages of the imagination Astronomy Un oggetto misterioso Blasted by a beam weapon on the edge of space Where's the big bang's "crater"? There never was a "crater"! Biology The star of the star-nosed mole Whale falls: stepping stones across the ocean abysses Ship falls: supplements to whale falls? Early life surprisingly diverse Geology Self-organized stone stripes Antipodal hotspot pairs Geophysics Seashore seiches The taos hum Another elliptical halo Psychology The effect of noncontact therapeutic touch on healing rate Computers can have near-death experiences! General Bruised apples "ALREADY, NOW, WE ARE FORGOTTEN ON THOSE STELLAR SHORES" * Mystery signals beam from space ...
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... Science Frontiers ONLINE No. 68: Mar-Apr 1990 Other pages Home Page Science Frontiers Online All Issues Last Issue Next Issue Sourcebook Project Sourcebook Subjects Contents Archaeology Michigan's prehistoric garden beds Now it's greece! Astronomy Wanted: a bona fide black hole Quiet sun: violent earth Biology Ants like amps Two-faced indians trick tigers Recent survival of the elephant in the americas Game of life favors right-handers New life for martian life Magnetic bacteria in the soil and who knows where else? Periodical invasions of aliens Geology Impact delivery of early oceans Geophysics The english hums: radar or buried pipelines? Double image of cresent moon Crop circle craze continues Psychology Higher sight Dreams that do what they're told Physics Science waits for - almost begs for - refutation General Conformity strikes again ...
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