233 results found.
... Science Frontiers ONLINE No. 38: Mar-Apr 1985 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Galloping Glaciers North America boasts 104 surge glaciers. No one knows why these glaciers behave so differently from normal glaciers; they certainly look the same. But while ordinary glaciers creep along a few inches per day , surging glaciers will sometimes charge ahead at the rate of several yards per hour . The surges may be years apart; and they may occur periodically. The surges start high up on the glacier and propagate down to the foot, which plods along a few inches per day until the surge arrives. Then, it leaps forward, only to return to normality until the next periodic surge. The surges seem to occur when water spreads out under the ice, lubricating its flow. Beyond this we know little. Why do some glaciers surge while those right alongside behave normally? Are the surges really cyclic? The Variegated Glacier, in Alaska, for example, surged in 1906, probably in 1926, in 1947, in 1964-65, and in 1982 -- about 20 years between surges. The surges do not seem to be connected to earthquakes, climatic changes, volcanic heat, or anything obvious. (Beard, Jonathan; "Glaciers on the Run," Science 85, 6:84, February 1985.) From Science Frontiers #38, MAR-APR 1985 . 1985-2000 William R. Corliss ...
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... Science Frontiers ONLINE No. 31: Jan-Feb 1984 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects The Sun As A Scientific Instrument In connection with the preceding item on solar oscillations and asymmetry, a few brave astrophysicists are now proposing that one mode of solar oscillation (the 160-minute period) is really a manifestation of the sun "ringing" in response to gravity waves sweeping through it! A nearby binary star, Geminga, has a period of this length. It seems that the 160-minute oscillation of the sun is far too long to be a solar pressure wave, and external forces could conceivably be involved. This article also mentions "the throbbing earth" reported in SF#30, an effect which may result from gravitational waves emanating from the center of our galaxy. (Walgate, Robert; "Gravitational Waves on the Sun?" Nature, 305:665, 1983.) From Science Frontiers #31, JAN-FEB 1984 . 1984-2000 William R. Corliss ...
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... Science Frontiers ONLINE No. 27: May-Jun 1983 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Ogham inscriptions in west virginia?Several petroglyphs in Wyoming and Boone counties, West Virginia, long-identified as random Indian doodling with little message content, may actually be Celtic Ogham writing. Translations of the petroglyphs reveal several Christian messages, as in the segment illustrated below. Based upon the style of the Ogham, these petroglyphs may have been chiseled some time between the early Sixth and late Eighth centuries. The Ogham writers may have been Irish monks who, after the fashion of St. Brendan, sailed west from Europe during this period. (Pyle, Robert L.; "A Message from the Past," p. 3. Gallagher, Ida Jane; " Light Dawns on West Virginia History," p. 7. Fell, Barry; "Christian Messages in Old Irish Script Deciphered from Rock Carvings in W. Va.," p. 12. All three articles appeared in: Wonderful West Virginia, vol. 47, March 1983.) Comment. Wonderful West Virginia is obviously not a science journal. Pyle is identified as an archeologist. The articles include many excellent color photographs of the inscriptions, so their reality can hardly be doubted. Reference. Our Handbook Ancient Man covers enigmatic ancient inscriptions in great detail. To order, see: here . Translation: "The season of the blessed advent of the Savior, Lord Christ (Salvatoris Domini Christi)" From Science Frontiers #27, MAY ...
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... Science Frontiers ONLINE No. 27: May-Jun 1983 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Electromagnetic Noise Prior To Earthquakes March 31, 1980. Tokyo, Japan. Anomalously high electromagnetic noise was recorded during a 30-minute period preceding a magnitude 7 quake, 250 km away and 480 km deep. The emissions were detected between 10 and 1500 Hz and around 81 kHz. July 24-28, 1976. Tangshan, China. For 3-5 days before the Tangshan earthquake, unusual radio interference was experienced within 250 km of Tangshan. Several similar cases are also on record, including one in which the radio noise coincided with the appearance of earthquake lights. No generally accepted physical mechanism for producing these electromagnetic emissions has been found. (King, Chi-Yu; "Electromagnetic Emissions before Earthquakes," Nature, 301:377, 1983.) From Science Frontiers #27, MAY-JUN 1983 . 1983-2000 William R. Corliss ...
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... Science Frontiers ONLINE No. 28: Jul-Aug 1983 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects The Alaskan Jigsaw Puzzle Alaska seems to be plastered together from bits and pieces that originated far from the present position of this state. The units that now make up southern Alaska, for example, started north of the equator 250 million years ago, crossed into the southern hemisphere, and started back north about 160 million years ago. However, the itinerary of northern Alaska cannot even be guessed at. Present thinking is that this portion of the state was close to the geographic north pole during the late Cretaceous. But this is the period when the huge coal deposits were formed on the Arctic slope. Much of this coal comes from evergreens, which could not have survived in high latitudes due to the lack of sunlight. So, the pieces of the puzzle are at hand, but their travels are a mystery. (Anonymous; "Fragmented Alaska," Open Earth, no. 17, 1982.) Reference. For more on exotic terranes, see ESR9 in our Catalog: Inner Earth. Ordering information here . From Science Frontiers #28, JUL-AUG 1983 . 1983-2000 William R. Corliss ...
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... Science Frontiers ONLINE No. 28: Jul-Aug 1983 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Hope for atlantis?" That huge vertical movements in the crust occur is not in question. One could cite the deep sea oozes resting on coals of Tertiary Age in Barbados, for example. The coals represent a shallow water, tropical environment which sank to over 4-5 km depth for the deposition of the ooze and was then raised again, all in a very short period." (James, Peter M.; "A New Model for Crustal Deformation," Open Earth, no. 17, 1982.) From Science Frontiers #28, JUL-AUG 1983 . 1983-2000 William R. Corliss ...
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... Science Frontiers ONLINE No. 30: Nov-Dec 1983 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Hot Plants You've heard of hot potatoes, but they aren't naturally hot. However, in the early spring skunk cabbages are and so are some philodendrons during their flowering periods. In fact, some philo-dendrons burn fat to generate their heat, just like animals. Metabolism based on fats allows some philodendrons to reach temperatures of 124 F. In terms of their rates of metabolism, they rival those of the humming birds. Further-more, philodendrons can regulate their chemical fires, whereas skunk cabbages, which burn only starch, consume all their stored energy like a rocket in one snow-melting crescendo. Why do plants generate heat? Apparently to attract pollinating insects. The hot skunk cabbage poking through the snow is the only food in sight for early spring insects, while the philodendrons may attract pollinating insects who like to bask or mate in warm places. (Blakeslee, Sandra; New York Times, August 9, 1983, p. C4. Cr. P. Gunkel) Comment. Are plants really "lower" forms of life? From Science Frontiers #30, NOV-DEC 1983 . 1983-2000 William R. Corliss ...
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... Science Frontiers ONLINE No. 30: Nov-Dec 1983 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Soil Temperatures Forecast Rainfall Patterns Dig a hole about 40 inches deep, take the soil temperature at that depth, and you can predict future wet and dry periods months ahead of time. To illustrate, warm spring soils are usually followed by rainy summers; cold soils precede dry summers most of the time. At first, American scientists doubted this Chinese discovery, but their re-search soon proved that the correlation is even stronger in the United States. The best explanation so far is that soil temperatures affect atmospheric convection and modify weather patterns locally. (Anonymous; "Digging for a Forecast," Science Digest, 91:30, September 1983.) From Science Frontiers #30, NOV-DEC 1983 . 1983-2000 William R. Corliss ...
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... nonsense. The Expanding Earth Hypothesis goes back to at least 1933, a time when the Continental Drift Hypothesis was accorded the same sort of ridicule. Now, Continental Drift is enthroned; and ironically many of its strongest proponents are vehemently opposed to the Expanding Earth, ignoring the lessons of history. The data that suggest that the earth has expanded significantly over geological time come from the pleasant pastime of continent fitting. If one takes the pieces of continental and oceanic crust and tries to fit them together at various times over the past several hundred million years, taking into account the production of crust at the midocean ridges, the fit gets worse and worse as one works backward in time. Great gaps (or "gores") appear between the pieces of crust which geologists believed existed at these periods. (Of course, one can play this puzzle-piece game only at passive continent-ocean boundaries where the oceanic crust has not slid under the continental crust. The South Atlantic is a good place to work.) These embarrassing, grotesque gaps can be made to disappear almost as if by magic by assuming that the earth was smaller in the past. This seems, on the surface, to be a crazy idea. Why would an entire planet swell up like a balloon? Hugh Owen answers in this way: "The geological and geophysical implications of such Earth expansion are so profound that most geologists and geophysicists shy away from them. In order to fit with the reconstruction that seems to be required, the volume of the Earth was only 51 per cent of its present ...
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... Science Frontiers ONLINE No. 37: Jan-Feb 1985 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects A DISASTER-DRIVEN EARLY CIVILIZATION Archeologists had long recognized the existence of a highly sophisticated early civilization in the Cauca Valley region stretching 550 miles from southern Ecuador into Columbia. This civilization produced a distinctive pottery and spectacular gold artifacts. It was obviously a highly advanced culture, technologically and socially. But it was dated at 400-800 AD; and for this period in South American history these accomplishments did not seem out of line. Recently, though, additional evidence of this civilization was discovered beneath a datable volcanic ash. The new dates for this civilization are 600-1 ,500 BC, putting it about 1,000 years ahead of Maya and Inca achievements. The "digs" show further that this culture was frequently beset by devastating outbursts of volcanic activity, which often rendered large areas of land uninhabitable. Rather than suppressing this remarkable culture, Donald Lathrap, a University of Illinois archeologist, says: "Those disasters pushed people from the region and led to upward leaps in social evolution..." (Anonymous; "Key to a Vanished Empire," San Francisco Chronicle, June 14, 1984. Cr. J. Covey.) Comment. The reaction of this early society of advanced organisms to environmental stress seems a perfect introduction to several items that follow on how cells and other species respond to stresses from without. From Science Frontiers #37, JAN-FEB 1985 . 1985-2000 William R ...
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... Science Frontiers ONLINE No. 32: Mar-Apr 1984 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Spores still viable after 7,000 years Bacterial spores embedded in muds lining Minnesota's Elk Lake -- the muds were carbon-dated at 7518 years(!) -- grew vigorously when placed in a nutrient-rich solution. (Anonymous; "Spores Still Viable after 7,000 Years," Science News, 124:280, 1983.) Comment. Such long periods of suspended animation support the panspermia concept, which states that life can be transported through outer space on meteorites and other debris. From Science Frontiers #32, MAR-APR 1984 . 1984-2000 William R. Corliss ...
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... Science Frontiers ONLINE No. 26: Mar-Apr 1983 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Punching A Hole In The Asteroid Hypothesis Scientists have long searched for a cause for the profound geological and biological changes that apparently occurred between the Cretaceous and Tertiary periods. When an iridium-rich layer was found in several areas at this important boundary, many claimed it as proof of an asteroid impact or some other catastrophism that would nicely explain the massive worldwide changes that occurred. With this preamble in mind, consider the following abstract from an article in Science: "Analyses of the clay mineralogy of samples from the Cretaceous-Tertiary boundary layer at four localities show that the boundary clay is neither mineralogically exotic nor distinct from locally derived clays above and below the boundary. The significant ejecta component in the clay that is predicted by the asteroid impact scenario was not detected." (Rampino, Michael R., and Reynolds, Robert C.; "Clay Mineralogy of the Cretaceous-Tertiary Boundary Clay," Science, 219:1983.) From Science Frontiers #26, MAR-APR 1983 . 1983-2000 William R. Corliss ...
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... Science Frontiers ONLINE No. 26: Mar-Apr 1983 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects The mind's rhythm Observations of individuals undergoing hypnosis suggest that intervals of particular susceptibility come along about every 90 minutes. Expert hypnotherapists are cognizant of this psychophysical cycle and often wait for it to appear. By closely watching the subject's swallowing, eye-blinking, respiration, etc., the hynotizer can take advantage of these periods of heightened susceptibility. (Rossi, Ernest L.; "Hypnosis and Ultradian Cycles: A New State(s ) Theory of Hypnosis?" American Journal of Clinical Hypnosis, 25:21, 1982.) Comment. The reason for this 90-minute rhythm and the control system behind it are obscure. From Science Frontiers #26, MAR-APR 1983 . 1983-2000 William R. Corliss ...
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... Science Frontiers ONLINE No. 35: Sep-Oct 1984 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects A Different Way Of Looking At The Universe Here is an excellent survey of American archeoastronomy from Canadian medicine wheels to Mesoamerican aligned structures. To the anomalist, the most interesting part of Aveni's review paper is found in his comments about the world view of the Precolumbian Americans, particularly the Maya. That the Maya were acute astronomers is beyond question. They had even developed a correction scheme to keep Venus' 584-day canonical cycle on track with its true synodic period of 583.92 days. Their predictions of the position of Venus were accurate to 2 hours in 481 years! Not bad for a civilization that did not seem to have any conception that the planets revolved around the sun. The Maya, in fact, did not seem to care what made heavenly bodies move; they only wished to predict their appearance accurately. Instead of developing celestial mechanics based on gravitation and laws of motion, as we have done, they were content with numerical algorithms; that is, ways of computing a desired result. Their astonishingly accurate predictions of Venus, solar eclipses, and other astronomical phenomena evolved from cycles of numbers advancing each day like interlocking gear teeth. These algorithms gave them no insight into cause and effect, but they got the right answers. They needed no physical laws, just patterns of numbers. It was a different way of comprehending and dealing with the universe. (Aveni, Anthony F.; " ...
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... Science Frontiers ONLINE No. 33: May-Jun 1984 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Comet Puffs A Smoke Ring When the periodic comet Kopff was photographed on August 13, 1983, using the 4-meter Mayall reflector at Kitt Peak, the black-and-white photo showed nothing out-of-the-ordinary. But digitization and computer enhancement revealed a previously unnoticed cloud of matter -million miles long trailing the nucleus. Curiously, the cloud resembled a huge smoke ring -- a distinct departure from the long, flowing tails shown in the textbooks. (Anonymous; "The Unusual Dust Cloud of Comet Kopff," Sky and Telescope, 67:226, 1984.) Comment. Obviously forces other than the solar wind were at work here. From Science Frontiers #33, MAY-JUN 1984 . 1984-2000 William R. Corliss ...
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... seem to have been carefully selected for size and shape. Most are oval or oblong and may be up to 8 centimeters long, 3 centimeters wide, and one centimeter thick. Over a thousand have been found around Europe. They have been considered primitive art, markers for prehistoric games, and possibly early forms of notation. Claude Couraude has analyzed the markings and concluded that particular combinations of signs recur frequently; the same for certain numbers of dots. There are 16 simple types of signs (dots and lines) but only 41 of the many possible combinations have been found. Evidence supports the existence of some sort of 'syntax.' Couraud speculates that some sort of cyclic notation is involved, perhaps lunar in nature, like some of the markings found on bones from the same general period. (Bahn, Paul G.; "How to Spot a Fake Azilian Pebble," Nature, 308:229, 1984.) Reference. Additional information on the Azilian pebbles may be found in our Handbook Ancient Man. To order, visit: here . Typical Azialian pebbles (from Ancient Man) From Science Frontiers #33, MAY-JUN 1984 . 1984-2000 William R. Corliss ...
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... restraint on physical movement, physical abuse, and the threat of death. For eight victims, these conditions were sufficient to produce a progression of visual hallucinations from simple geometric images to complex memory images coupled with dissociation. The other 23 victims, subjected to similar conditions but without isolation and life-threatening stress, did not experience hallucinations. The hostage hallucinations are compared to those resulting from sensory deprivation, near fatal accidents, and other states of isolation and stress. A common mechanism of action based on entopic phenomena and CNS (central nervous system) excitation and arousal is suggested." In a typical case, an 18-year-old female college student was kidnapped and held for ransom. She was bound, blindfolded, and denied food, water, and toilet facilities. She was periodically threatened with death. She saw dull flashes of light in front of her eyes and small animals and insects on the periphery of her visual field. Becoming hypervigilant, she heard strange sounds and whispers. Hearing loud noises, she thought her captors were coming to kill her. It was then her whole life ran off like a slide show before her eyes. The noises were the police coming to rescue her. (Siegel, Ronald K.; "Hostage Hallucinations," Journal of Nervous and Mental Disease, 172:264, 1984.) Comment. Some of the hostages experienced the tunnel hallucination so common in near-death visions. These seemingly 'built-in' or hard-wired images may be related to UFO and sea-serpent phenomena. From Science Frontiers # ...
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... Nov-Dec 1983 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects What happened in 2345 b.c .? Australian astronomer G.F . Dodwell has analyzed the observational records com-piled for the many gnomons erected all over the civilized world during the past 4,000 years. Gnomons are vertical markers that cast shadows from which the local latitudes can be computed. (All one needs are the measurements of the shadow lengths on the longest and shortest days of the year.) The earth's tilt or obliquity-of-the-ecliptic may also be calculated from gnomon data -- and therein lies the anomaly. The tilt of the earth's axis is supposed to vary cyclically between 22 and 24.5 over a period of some 40,000 years due to the pulls of the moon, the sun, and the planets on the earth's equatorial bulge... Tilt angles computed from ancient gnomon observations deviate markedly from the theoretical curve. The alignment of the ancient Egyptian temple at Karnak and other oriented sites extend the deviation toward the date 2345 B.C . Either the ancient observations were systematically in error all over the world or the earth's tilt angle changed in historical times. (Bowden, M.; "The Recent Change in the Tilt of the Earth's Axis," Pamphlet No. 236, July 1983. Creation Science Movement.) Comment. One would think that such startling data, compiled by a recognized astronomer, would be the subject of in- ...
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... Science Frontiers ONLINE No. 25: Jan-Feb 1983 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects More on "the massive solar companion"Something big out there beyond Neptune perturbs the orbits of the sun's outer fringe of planets. In addition, there are unexplained perturbations in the orbits of earth satellites, peculiar periodicities in the sunspot cycle, and equally puzzling regularities in earthquake frequency. Infrared detectors have also picked up unidentified objects in the sky. These anomalies might all be explained by the existence of a large, dark planet with several moons -- or, if the mystery object turns out to be very far away, by a very large, dark stellar companion of our sun with its own system of planets. Several astronomers have been trying to pin down the properties of this Planet X or Massive Solar Companion (MSC). John P. Bagby has recently published a novel solution to this nagging puzzle in celestial mechanics. He suggests that the Massive Solar Companion is actually a distributed system; that is, appreciable mass also occupies the several stable Lagrangian points. The total MSC mass might be as much as half the sun's mass, perhaps 100 Astronomical Units (100 times the earth's distance from the sun.) If the MSC and its attendants are this massive, astronomers will have to revise the mass and density of the sun downward by a good bit. (What they have done in the past is estimate the mass of the solar system as a whole and assumed it mostly resides ...
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... cup is oriented due south. The disk is set in the stone pavement of a small terrace that is slightly elevated above the level of the Central Court. This strange monolith, which dates circa 1,900-1 ,750 BC, has been a puzzle to scholars since its discovery in 1926 by French excavators. C.F . Herberger's thesis is that the disk is a lunisolar clock. The 33 small cups provide a convenient and symmetrical division of the 99 lunations of the 8-year cycle. By moving markers, one could have a fairly accurate lunisolar clock. The 34th. cup, by virtue of its larger size, would announce the need for an intercalcated month. This sort of clock, even though arrived at empirically, represents a remarkable innovation for a period almost 4,000 years ago. (Herberger, Charles F.; "The Mallia Table: Kernos or Clock?" Archaeoastronomy, 6:114, 1983.) Diagram of the Mallia disk, with intercalation cups in black. Diameter: about 3 ft. From Science Frontiers #36, NOV-DEC 1984 . 1984-2000 William R. Corliss ...
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... manufactured by bacteria are cubes, hexagonal prisms, or noncrystalline teardrops. The magnetite found in marine sediments appears to be organically formed -- at least the shapes of the particles are characteristic of bacterial manufacture. Apparently these industrious bacteria have been busy producing magnetite ever since "lowly" life forms appeared in the Precambrian. These facts pose at least four questions: How much of the earth's iron ore has been concentrated biologically and is there a connection with the Gaia Hypothesis? Is it possible that magnetic field reversals, now believed to be of purely geophysical origin, might be biological artifacts (that is, due to population and/ or species changes of magnetic bacteria)? If magnetic field reversals are of geophysical origin, how do the magnetic bacteria find their food sources during the long periods of near-zero field? Lab experiments prove that magnetic bacteria require free oxygen to secrete magnetite, but the Precambrian atmosphere and oceans were supposedly devoid of oxygen until 2.3 billion years ago. How did the magnetic bacteria prosper before then? (Simon, C.; "Tiniest Fossils May Record Magnetic Field," Science News, 124:308, 1983.) From Science Frontiers #31, JAN-FEB 1984 . 1984-2000 William R. Corliss ...
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... , in the last 9 million years not only has the entire gorge of the Grand Canyon been cut but also a much greater volume of rock 300 meters thick adjacent to the present north and south rims. The immensity of the volume of sediment removed is not the real issue. The first problem emerges downstream from Red Butte at Pierce Ferry. There we find 200 meters of Hualapai limestone, which has been dated at 8.7 million years from a thin layer of volcanic ash within the limestone. When this limestone was laid down, the geology is emphatic that no large, sediment-carrying river was in the vicinity. Most geologists agree that the lower end of the Grand Canyon was not active around this time. No one knows where the Col-orado River was flowing at this period. Some say southwest from Peach Springs; others point to a northwest route into Utah. All the likely alternate routes face serious geological obstacles such as lava barriers. What does seem certain is that the stock explanation of the formation of the Grand Canyon is incorrect. It was not steadily ground out, cutting everdeeper as the whole region was slowly elevated. Actually, geologists believe that the region stopped rising over 50 million years ago. Where, then, did the sediments from a 450-kilometer canyon and the wide areas surrounding its rims go? The present exit of the Colorado near Pierce Ferry was blocked until fairly recently while the Hualapai limestone was being deposited; and other routes don't look too promising. (Rice, R.J .; "The Canyon Conundrum, ...
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... Science Frontiers ONLINE No. 31: Jan-Feb 1984 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Phoenix vs. the hohokam Rapidly expanding Phoenix is gobbling up the vestiges of the Hohokam. Archeologists are striving to save as much information as possible before the bulldozers destroy the best artifacts left by this remarkable Indian civilization. This beautifully illustrated article touches on several of the precocious and puzzling features of the Hohokam Period, circa 0-1 ,400 AD. (1 ) The Hohokam apparently employed acid-etching to produce designs on shells. Acetic acid from fermented cactus juice was use to eat away portions of the shell not protected by tar. (2 ) Four-story Casa Grande, which seems to have been an astronomical observatory, required at least 600 big wooden beams, all of which had to be transported over 50 miles from sources in the mountains. (3 ) The Hohokam built an elaborate, well-engineered system of irrigation canals. (4 ) Unexplained are many flat-bottomed oval pits up to 182 feet long, 55 feet wide, and 13-18 feet deep. Some surmise they were ball courts. (5 ) Also puzzling are rectangular earthen mounds, 75 x 95 feet at the base and 12 feet high, with flat adobe-covered tops. (Adams, Daniel B.; "Last Ditch Archeology," Science 83, 4:28, December 1983.) Reference. The Hohokam canals and those built by other ancient peoples are presented in our Handbook Ancient Man. For ...
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... Science Frontiers ONLINE No. 50: Mar-Apr 1987 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Too many short-period comets Some comets, such as Halley's , have periods of less than 200 years. Scientists have postulated that these comets, which orbit relatively close to the sun, originally came from the far-distant Oort Cloud on parabolic (non-returning) orbits around the sun. Perturbations by the planets, notably Jupiter, deflected them into the tighter orbits we see today. The problem is that the number of parabolic comets entering the inner solar system from the Oort Cloud of comets (located at the outermost fringes of the solar system) is 100 times too small to account for the existing population of short-period comets. M.E . Bailey believes this discrepancy can be removed if the Oort Cloud possesses a massive inner core of comets. (Bailey, M.E .; "The Near-Parabolic Flux and the Origin of Short-Period Comets," Nature, 324:350, 1986.) Reference. The Oort Cloud of comets is an entrenched part of astronomical dogma. For observations challenging its existence, see our catalog: The Sun and Solar System Debris. A description of this book may be found here . From Science Frontiers #50, MAR-APR 1987 . 1987-2000 William R. Corliss ...
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... Science Frontiers ONLINE No. 48: Nov-Dec 1986 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects An 11-minute binary 4U1820-30 is an X-ray binary star located in the heart of the globular cluster NGC 6624. Its claim to fame is a very short period of rotation -- only 685 seconds. In just a shade over 11 minutes, a neutron star orbits a white dwarf, according to present thinking. The orbit diameter is only 1/7 the radius of our sun, which implies the stars themselves are also small. 4U1820-30 is the shortest-period binary ever found -- so short that astronomers are looking for other explanations. Another curious fact mentioned in this item is that X-ray binaries are much more common in globular clusters than elsewhere in the universe. What is so different about globular clusters? (King, A.R ., and Watson, M.G .; "The Shortest Period Binary Star," Nature, 323:105, 1986.) From Science Frontiers #48, NOV-DEC 1986 . 1986-2000 William R. Corliss ...
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... Science Frontiers ONLINE No. 49: Jan-Feb 1987 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Halley's confounding fireworks "Serendipitous discovery in science so often comes as a surprise, even when it might reasonably be expected. Such was the case with Comet Halley in the wake of an observation program that dwarfed all preceding efforts. The surprises included sudden outbursts in the presumably steady vaporization of its icy nucleus and a periodic, complex pulsation of the comet's brightness. Whether this pulsation reflects the rotation of the nucleus, or some still unimagined phenomenon became a controversial focus of the recent meeting on the Exploration of Halley's Comet in Heidelberg." Some of the data presented and some of the attendees at this conference supported a rotational period of 2.2 days; others favored 7.4 days; a few liked a 2.2 -day period with a 7.4 -day wobble superimposed. (Kerr, Richard A.; "Halley's Confounding Fireworks," Science, 234:1196, 1986. Also: Campbell, Philip; "How Fast Does Halley Spin?" Nature, 324:213, 1986.) Halley's fireworks (visible outbursts) have also stimulated comet model-making. The latest is an icy-glue construction of sorts. See the accompanying figure and the accurate but not-particularlyenlightening caption. (Gombosi, Tamas I., and Houpis, Harry L.F .; "An Icy-Glue Model of Cometary Nuclei," Nature ...
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... Science Frontiers ONLINE No. 44: Mar-Apr 1986 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Squirrels As Measures Of Geological Time Over a century ago, when the truth of biological evolution via natural selection was hotly debated, the proponents of Darwinism were delighted when the geologists presented them with almost endless periods of time in which evolution could progress in small steps from species to species. Now, in a strange turn-about, a creationist writer is using evolutionary theory to infer a very short history for the formation where geologists want a good deal of time. We quote from the conclusion of J.R . Meyer: "If any group of animals were ever going to undergo significant degrees of evolution from parent stock and obtain resultant speciation, surely the Kaibab squirrel would be one of the more likely candidates. Supposedly isolated from their neighbors for hundreds of thousands of generations over a period of at least several million years, and significantly violating virtually every restriction of the Hardy-Weinberg equilibrium for the non-evolving population, these organisms, even by creationist standards, should have undergone significant and detectable changes. In reality all they show are moderate changes, primarily in two coat color characteristics for part of their population. To make things even worse, this species is known to have a highly variable coat-color polymorphism throughout its range. Thus, even the differences displayed appear to be easily accounted for by several mutations and a slight change in gene frequency for one or two loci, all occurring in a limited period of ...
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... Science Frontiers ONLINE No. 41: Sep-Oct 1985 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Anatomy Of A Magnetic Field Reversal "A highly detailed record of both the direction and intensity of the Earth's magnetic field as it reverses has been obtained from a Miocene volcanic sequence. The transitional field is low in intensity and is typically non-axisymmetric. Geomagnetic impulses corresponding to astonishingly high rates of change of the field sometimes occur, suggesting that liquid velocity within the Earth's core increases during geomagnetic reversals." The time period required for the field to reverse was about 4500 years, as measured at Steens Mountain, Oregon. There were three periods of very rapid change (impulses), which hint at radical changes in the core. The average magnetic field at the earth's surface decreased to 20% of normal during the reversal. (Prevot, Michel, et al; "How the Geomagnetic Field Vector Reverses Polarity," Nature, 316:230, 1985.) Comment. The illustration reveals that the reversal was far from a clean 180 flip; there was much meandering. Just what was happening in the core during the reversal is a mystery. When the magnetic field dropped to low levels, flux of cosmic rays and other radiation at the earth's surface probably increased drastically. Terrestrial life might have been adversely affected. The Steene Mountains directional record. The numbers refer to the samples used from the volcanic sequence, in order of increasing age. Dotted lines represent field directions in the ...
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... Science Frontiers ONLINE No. 42: Nov-Dec 1985 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects The Missing Sunspot Peak The following is also an abstract from the publication Cycles. "An analysis of the mean annual sunspot numbers is made with particular emphasis on cycles have periodicities near 21 years. The results are compared not only with the original sunspot data but also with long-term geomagnetic and economic data. It is concluded that the '11-year' solar cycle periodicity increased during the 19th century, during which time there were only 8 peaks when 9 might have been expected. Doubt is cast on the reality of a 22-year sunspot cycle during the past three centuries, and the likelihood is shown that the reliable 21.2 -year sunspot cycle is also the Hale magnetic cycle and that several of its harmonics are present in the economic data." (Robbins, Roger W.; "The Case of the Missing Sunspot Peak," Cycles, 36:53, 1985.) From Science Frontiers #42, NOV-DEC 1985 . 1985-2000 William R. Corliss ...
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... Issues This Issue Sourcebook Project Sourcebook Subjects Forbidden Matter When a hot mixture of aluminum and manganese, iron or chromium is squirted onto a spinning water-cooled copper wheel, the molten metal freezes into a thin, metallic ribbon. If it is cooled too fast, a metallic glass results; cooled too slowly, it forms normal metal crystals. But when conditions are just right, icosahedral crystals cluster together in nodules a few microns in size. These icosahedral crystals are not normal in the sense that they have five-fold symmetry. In fact, to a crystallographer, these crystals are the equivalent to ESP in psychology. All the rules of crystallography insist that icosahedral crystals should not exist. One scientist reacted in this way: "All my training has been with the assumption that crystals are periodic. Now, almost everything has to be reexamined." Actually, the icosahedral crystals are "quasi-periodic"; that is, they are completely regular only over small distances. Nevertheless, there are hints that these materials that should not exist have remarkable structural and electronic properties. (Peterson, Ivars; "The Fivefold Way for Crystals," Science News, 127:188, 1985.) Two-dimensionsal quasiperiodic geometry (Penrose tiling) with five-fold symmetry formerly thought to be impossible in nature. The tricontahedron with 30 faces is the basis of three-dimensional quasiperiodic structures with five-fold symmetry. From Science Frontiers #39, MAY-JUN 1985 . 1985-2000 William R. Corliss ...
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... the Brittany coast, C.-T . Le Roux discovered carvings that had long been concealed. The carvings and the rock itself fit perfectly with the capstone of the Table des Marchands, another famous megalithic monument some 4 kilometers away. Stimulated by this discovery, a third capstone on another monument nearby was found to fit like a jigsaw puzzle piece. The combined result is a huge stela 14 meters high, 3.7 meters wide, and 0.8 meter thick. The total stela would weight about 100 tons. It is decorated on one side with animals (bovids) and other devices. Apparently, this stela once stood near the even larger stela called Grand Menhir Brise or 'er-Grah.' The Grand Menhir Brise is also broken into pieces. Evidently, the period of megalithic tomb building, which probably began about 5,200 BP was preceded by a period when giant, decorated stelae were erected. These stelae were later pulled down and broken up for use in constructing tombs. The civilization that raised the stelae is not well-understood; and one wonders why such impressive monuments were torn down and their engravings concealed. Incidentally, the stela chunk found at Gavrinis weighs about 20 tons and was transported over 4 kilometers across several watercourses. (Bahn, Paul G.; "Megalithic Recycling in Brittany," Nature, 314:671, 1985.) Reconstruction of a decorated stela from capstones on megalithic tombs in Brittany. From Science Frontiers #40, JUL-AUG 1985 . 1985-2000 William R. Corliss ...
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... Science Frontiers ONLINE No. 42: Nov-Dec 1985 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Peace And Sunspots We quote the abstract of an article that appeared in the journal Cycles: "Periods of international peace were found to occur in nearly regular cycles of 11 years by Edward Dewey in 1957 by analyzing the earlier data of Raymond Wheeler. In this paper the phase relationship between sunspot cycles and international battles was investigated. It was found that peaceful periods ended 7 out of 11 times within two years prior to sunspot peaks. The probability of this occurring by chance is less than .008. "Geomagnetic storms are postulated as the triggering event since: Geomagnetic storms are known to occur with greater frequency and intensity near sunspot peaks; and Geomagnetic storms have been found by other researchers to be associated with increased frequency of accidents, illness, psychiatric hospital admissions, and crimes." (Payne, Buryl; "Cycles of Peace, Sunspots, and Geomagnetic Activity," Cycles, 35:101, 1984.) From Science Frontiers #42, NOV-DEC 1985 . 1985-2000 William R. Corliss ...
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... Science Frontiers ONLINE No. 44: Mar-Apr 1986 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Northwest indian tradition of a large-scale sea inundation Science, quite wisely, places little value on legend and tradition. The authors of this article stess the pitfalls of using data handed down verbally from generation to generation. With these caveats, they reproduce an Indian tradition originally set down by Judge James Swan back in 1888: "' A long time ago,' said my informant, 'but not at a very remote period, the water of the Pacific flowed through what is now the swamp and prairie between Waatch village and Neeah Bay, making an island of Cape Flattery. The water suddenly receded leaving Neeah Bay perfectly dry. It was four days reaching the lowest ebb, and then rose again without any waves or breakers, till it had submerged the Cape, and in fact the whole country, excepting the tops of the mountains at Clyoquot. The water on its rise became very warm, and as it came up to the houses, those who had canoes put their effects into them, and floated off with the current, which set very strongly to the north.'" The authors of the present article wonder if the above could be an account of a massive tsunami! They admit that the 4-day recession is inconsistent with tsunami action and that the warm water is hard-to-explain. The height reached by the inundation -- some 400 meters -- is also incredible. (Heaton ...
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... Science Frontiers ONLINE No. 41: Sep-Oct 1985 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Green Sky Flashes March 25, 1984. Indian Ocean. "Two successive 'green flashes' were observed. The first, at 2100 Ship's Time or 1530 GMT, was a bright green and bore 240 at an altitude of 75 ; it moved vertically downwards to an altitude of approximately 20 over a period lasting about 3 seconds. The second flash was observed at 2250 Ship's Time. It was green/white and was first observed at an altitude of 40 , bearing approximately 340 .It moved diagonally across the sky before disappearing behind low cloud at an altitude of 30 , bearing 310 . This time the duration was 1-2 seconds. In both cases the ship's radars were turned on but nothing was observed other than rain showers between 4 and 12 n. mile from the ship, mainly forward of the beam. Both flashes were of about the same brightness as that of lightning, the first being brighter than the second. In both cases it was difficult to judge the distance. The phenomenon was thought to have possibly been some form of lightning as its appearance was unlike that of any flare and in both cases the distance from the ship did not appear great enough to be compatible with a meteor or other object entering the earth's atmosphere." (Aston, A.; "' Green Flashes'"; Marine Observer, 55:30, 1985.) Comment. ...
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... provided by government agencies and that such a significant observation from a region of demonstrated military sensitivity was, and still remains, a mystery." (McKenna, Daniel L., and Walker, Daniel A.; "Mystery Cloud: Additional Observations," Science, 234:412, 1986.) Evidently the mystery cloud mentioned above is only one in a long series: "Large icy clouds, similar to plumes of gas that rise over volcanoes, have appeared over islands along the coast of the Soviet Union during the past several years, baffling experts, who cannot explain what they are or what causes them. "The clouds dissipate in a few hours vanishing as mysteriously as they appear. "Among the plumes are a series of massive clouds that during the past four years have periodically swelled over Novaya Zemlya, the Arctic island long used by the Soviets for nuclear weapons tests. "However, there appears to be no correlation between the clouds and known Soviet tests, which are usually detected by Western governments. Further, non-governmental scientists said the 200-mile-long plumes appear to be many times larger than the largest conceivable nuclear explosion could produce." A NOAA satellite detected a large plume coming from the Arctic Ocean near Bennett Island, north of the Soviet Union, in 1983. Three distinct sources were found; one on the island and the other two about 9 miles offshore on the ice-covered ocean. This plume was 6 miles wide, 155 miles long, and 23,000 feet high. (Anonymous; "' Plumes' over ...
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... present day levels. Moreover if the particles found in these ice core samples are indicative of the particle size distribution which prevailed in the interplanetary medium at that time, then it may be concluded that the space number density of submicron sized particles must have uncreased by a factor of 105 or more. During these times the light transmission properties of the solar system would have been significantly altered resulting in major adverse effects to the earth's climate. Thus it is quite possible that these dust congestion episodes were responsible for the abrupt climatic variations which occurred toward the end of the last Ice Age." Whence these interplanetary dust clouds? The author of this article ruled out terrestrial volcanism (an insufficient source of iridium) and encounters with asteroids and cometary tails (too infrequent to account for the long periods of high dust levels). Rather, the dust source may have been the same event that created the recently discovered dust ring between Mars and Jupiter, which is believed to be only a few tens of thousands of years old. The nature of the "event" is not specified. (LaViolette, Paul A.; "Evidence of High Cosmic Dust Concentrations in Late Pleistocene Polar Ice (20,000-14,000 Years BP)," Meteoritics, 20:545, 1985.) References. See our catalog volume The Sun and Solar System Debris for more on the flotsam and jetsam of outer space. This book is described here . Also see the following item on "icy meteors" which is also pertinent. From Science Frontiers #44, MAR-APR ...
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... plastered with lava flows and cinder cones. It is like a sponge, with many cubic miles of holes, air channels, and open fissures. The air in this rocky sponge is usually on the move in response to changes in atmospheric pressure. The earth absorbs air during barometric highs and expels it during lows. In some spots the expelled air is captured to cool homes during the summer. In the High Cascades, though, the underground winds pose hazards to skiers by creating blowholes in the snow. These blowholes are actually mildly anomalous because they blow out a gentle 40 F breeze regardless of the barometric pressure. Some of Oregon's blowing caves also "breath" without re gard to barometric pressure. Also, the water wells north of Fort Rock Basin often blow for days during periods of high barometric pressure -- times when they should be taking air in. (Chitwood, Larry; "Central Oregon's Underground World Filled with Wind That Roars, Whistles," The Oregonian, Octo ber 3l, 1985. Cr. R. Byrd) Comment. See category GHG2, in Earthquakes, Tides, Unidentified Sounds, for material on blowing wells, etc. This catalog volume is described here . From Science Frontiers #43, JAN-FEB 1986 . 1986-2000 William R. Corliss ...
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... discovered by accident. Normally, the magnetometer scans each cell as the cell moves horizontally beneath the magnetometer. During one run, the researchers left the cell in a single position for a long time while the magnetometer was still on. After 20 minutes or so, the magnetic field strength began to drop. 'It was very dramatic to watch this field collapse,' says MacVicar. After about a minute at zero, the magnetic field grew larger again but in the opposite direction." These reversals occurred over and over again at regular intervals. (Peterson, I.; "Tracing Corrosion's Magnetic Field," Science News, 130:132, 1986.) Comment. The self-reversal of magnetic specimens has been observed before under some conditions, but here is a periodic reversal of an electrochemical system. Why place it under the heading of Geology? Because the earth's field seems to reverse on a fairly regular basis. Catastrophists have invoked as teroid or cometary collions to account for these flip-flops, but it might be that the earth contains giant electrochemical cells that spontaneously reverse on a million-year timescale rather than minutes. We know the earth's crust is filled with brines and other conducting fluids. Who knows what electrochemical activity transpires down there? From Science Frontiers #48, NOV-DEC 1986 . 1986-2000 William R. Corliss ...
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... " (Weisburd, S.; "Oldest Bird and Longest Dinosaur," Science News, 130:103, 1986.) Chatterjee has named the new fossil Protoavis. "Protoavis seems certain to reopen the long-running controversy on the evolution of birds. In particular whether the common ancestor of birds and dinosaurs was itself a dinosaur. Protoavis, from the late Triassic, appears at the time of the earliest dinosaurs, and if the identification is upheld it seems likely that it will be used to argue against the view of John Ostrom of Yale University that birds are descended from the dinosaurs. It also tends to confirm what many paleontologists have long suspected, that Archaeopteryx is not on the direct line to modern birds. It is in some ways more reptilian than Protoavis, and the period between the late Jurassic Archaeopteryx and the world-wide radiation of birds in the Cretaceous has to some seemed suspiciously brief." (Anonymous; "Fossil Bird Shakes Evolutionary Hypotheses," Nature, 322:677, 1986.) Comment. But what about all those textbooks that assure us positively that birds descended from dinosaurs and that Archaeopteryx is a classic missing link? Fossil bones and artist's reconstruction of Protoavis. From Science Frontiers #48, NOV-DEC 1986 . 1986-2000 William R. Corliss ...
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... his 51 sources. In his view, it boils down to the fact that the old maps, which people of all persuasions use, are often incomplete and ambiguous. One can read a lot into them. To claim an ice-free Antarctica, one has only to make a few assumptions. For example, one reduces the size of a map feature here and rotates another there. It seems that those old map-makers didn't get things quite right! Jolly is fair about the whole business and even admits his admiration for Hapgood. In part, his conclusions are: "Our knowledge of early cartography is limited, since much of the material from the sixteenth century is now lost. While this affords ample opportunity for speculation, there have been many scholarly studies of this period. These studies were not done by dunces, but by individuals who spent years acquiring the skills and perception necessary to interpret the evidence. Professor Hapgood, to his credit, spent almost ten years studying the evidence and consulting experts in the field. His ideas were rejected in scholarly circles not because of animus but because he had not proved his case. Too many leaps of faith were needed to establish his thesis. I fear it is impossible to be equally charitable toward some later advocates of the Hapgood thesis, whose methods do little credit to his memory." (Jolly, David C.; "Was Antarctica Mapped by the Ancients," Skeptical Inquirer, 11:32, 1986.) Antarctica is in the eye of the beholder. Do these two maps show the same ...
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... Science Frontiers ONLINE No. 43: Jan-Feb 1986 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects The Cretaceous Incineration The worldwide deposit of iridium at the end of the Cretaceous implies, to many at least, that the great biological extinctions of this period were the consequence of a meteorite impact. It has now been discovered that clay samples from the Cretaceous-Tertiary boundary also contain 0.36-0 .58% graphitic carbon. It is fluffy stuff and suggests that the planet was once covered by a thick layer of soot. Quantitatively, the soot layer is equivalent to the carbon in 10% of the earth's present biomass. The authors speculate that this soot was created by huge wildfires that consumed much of the earth's vegetation and perhaps fossil fuel as well. Terrestrial life was, of course, devastated -- just as it is in the currently popular "nuclear winter" scenarios. The end-of-the-Cretaceous soot is in fact, thicker and more widely spread than nuclear winter theories predict. (Wolbach, Wendy S., et al; "Cretaceous Extinctions: Evidence for Wildfires and Search for Meteoric Material," Science, 230:167, 1985.) Comment. Questions arise, though: How could a single meteorite impact ignite worldwide wildfires? Why haven't other meteorite impacts, recorded abundantly by large craters and astroblemes, also set fire to the planet and left iridium layers? From Science Frontiers #43, JAN-FEB 1986 . 1986-2000 William ...
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... down through your shoulder, down through your arm, through your hand, and put it into the silverware at the point you intend to bend it.' 'Command it to bend.' 'Release the command and let it happen.' "He then instructed the group to use their fingers to test for warmth coming out of the silverware or to feel the metal surface become sticky. Everyone felt pretty silly, sitting there holding the silverware, until the head of a fork being held by a boy (age 14) bent over all by itself! Almost everyone in the room saw this happen and experienced an instantaneous belief system change. Then the silverware in the hands of many people in the room became soft. They easily bent and twisted the silverware into unusual shapes. The period during which the metal remained soft was between five and twenty seconds. Everyone was shouting and extremely excited. During the next hour, nineteen of the party attendees had experienced the metal getting soft and being easily formed into any shape." Such PK 'parties' have been held scores of times since 1981, leaving trails of damaged kitchenware and popped soy beans. It's all a lot of fun. The people attending "feel good" about themselves and their shared experiences. (Houck, Jack; "PK Party History," in Proceedings of a Symposium on Applications of Anomalous Phenomena, C.P Scott Jones, ed., Kaman Tempo, Alexandria, Virginia, 1984.) Comment. Is mass delusion the foundation of PK parties? Is the above article serious ...
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... habitation at Nan Madol as early as A.D . 500, and the megalithic construction was completed by about 1500." Besides incongruity and a certain bizarreness, Nan Madol does pose several problems: How were the huge, very heavy prismatic columns of basalt quarried and transported? Why was Nan Madol built at all? Why about 1400 AD did the inhabitants stop building their massive ocean-going canoes and begin a decline? (Hanley, Charles J., "Oregon Anthropologist Unravels Story of Lost City of Pacific," The Oregonian, February 3, 1986. Cr. D.A . Dispenza.) Comment. An associated question asks why the builders of Nan Madol, the Maya, the Hohokam, the Moundbuilders, and other cultures all decline so precipitously at about the same period? See the accompanying article on the bubonic plague. Reference. For more on Nan Madol, see our catalog Ancient Man. It is described here . A portion of "temple" at Nan Madol. It is contructed from natually occurring basalt prisms. (Courtesy Bishop Museum; also from Ancient Man). From Science Frontiers #45, MAY-JUN 1986 . 1986-2000 William R. Corliss ...
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... Science Frontiers ONLINE No. 52: Jul-Aug 1987 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Do large meteors/comets come in cycles?Only a few years ago, geologists refused to recognize any terrestrial meteor craters larger than Arizona's Meteor Crater, which is merely a mile or so in diameter. Now, we have a long list of craters or astroblemes (star wounds), some of which measure hundreds of miles across. In fact, there are enough large dated crters so that some scientists have taken up a time-honored human pastime: Looking for cycles or periodicities in the data. (Humans can find cyclicities in almost any collection of data!) To be more specific, some have claimed that large meteor craters come in clusters dated 28-31 million years apart. These catastrophic events have been correlated with biological extinctions, magnetic field reversals, and basalt flooding. The astronomical causes of this supposed periodicity range from the solar-system's crossing of the galactic plane, to the perturbations of an unseen solar companion, to regular perturbations of the Oort cloud of comets that is thought to hover at the fringe of the solar system. In short, a large, interlocking edifice of geological and astronomical speculation has been erected upon a foundation of terrestrial crater ages. But how well do we really know the ages of these craters? How complete is the cratering record? The answer to the first question is: "Not well at all." Further, we can be certain that many ...
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... Science Frontiers ONLINE No. 57: May-Jun 1988 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects A NEARBY RING OF COMETS?Some 589 long-period comets are known. They ply orbits around the sun that may take millions of years to complete. Astronomers are generally agreed that these bodies originate in a very distant (100,000 A.U .* ) halo of cometary material surrounding the entire solar system. J. Oort proposed this cloud, and it is named after him. Of course, we anomalists become wary when scientists "generally agree" on a hypothetical entity that no one can see. The Oort Cloud of comets, like the unseeable black holes, are given substance only by the effects they have on other solar-system denizens and seeable cosmic objects. But there may be another cloud of comets that we can view directly. It is called the Kuiper Cloud (after G. Kui per). It is concentrated in the plane of the ecliptic just beyond the orbit of Neptune. Like the Oort Cloud, the Kuiper Cloud has not been seen yet, but we just might be able to with today's equipment! Its existence is hypothesized from the parameters of a different group of comets -- the so-called "short-period" comets, as exemplified by 76-year Halley's Comet. About 120 short-period comets have been discerned so far; and our computers now tell us that they cannot have originated in the Oort Cloud. Something closer and concentrated ...
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... Science Frontiers ONLINE No. 63: May-Jun 1989 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects A Hex On Saturn "By piecing together pictures of Saturn taken by the Voyager-2 spacecraft, David A. Godfrey (National Optical Astronomy Observatories) has discovered an unusual feature in the planet's atmosphere. His mosaics reveal a hexagon centered on the north pole. Since neither probe flew directly over the pole, the complete scene has to be created by 'stretching' a series of photographs taken from the side as Saturn rotated, then fitting them into a polar projection." The straight sides of the hexagon are each about 13,800 kilometers long. The entire structure rotates with a period of 10h 39m 24s, the same period as that of the planet's radio emissions, which is assumed to be equal to the period of rotation of Saturn's interior. The hexagonal feature does not shift in longitude like the other clouds in the visible atmosphere. The pattern's origin is a matter of much speculation. Most astronomers seem to favor some sort of standing-wave pattern in the atmosphere; but the hexagon might be a novel sort of aurora. More extreme speculation has Saturn's radio emissions emanating from the hexagon (something we can see and which has the right rotation period) rather than from the planet's interior (something we cannot see). (Anonymous; "A Hex on Saturn," Sky and Telescope, 77:246, 1989.) Comment. Note ...
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... Science Frontiers ONLINE No. 62: Mar-Apr 1989 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects DANCING TO THE COMETS' TUNE "When planetary scientists examine one kind of meteorite rich in iron, the H-chondrites, they find that the meteorites' ages do not spread evenly through time. Instead, the ages seem to cluster at 7 and 30 million years." Astronomers have hitherto been content to attribute these clumped ages to collisions among the meteorites' parent bodies - the asteroids - which ply periodic orbits. However, S. Perlmutter and R.A . Muller, at Berkeley, point to the apparent 26- to 30-million-year periodicities of three terrestrial phenomena: Biological extinctions in the fossil record, Magnetic field reversals, and Terrestrial-crater ages. Could there be a connection between the clumped meteorite ages and these terrestrial phenomena? Perlmutter and Muller propose that all of these phenomena are the consequence of periodic storms of comets that invade the inner solar system from the direction of the Oort Cloud of comets that purportedly hovers at the fringe of the solar system. These comets not only devastate the earth but also collide with the asteroids, knocking off those bits and pieces we call meteorites. (Anonymous; "Do Meteorite Ages Tell of Comet Storms?" Astronomy, 17:12, January 1989.) Comment. Unanswered above is the question of why comet storms should be periodic. One hypothesis is that Nemesis, the so-called Death Star, a dark companion of our sun, lurks ...
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... Science Frontiers ONLINE No. 51: May-Jun 1987 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects A Larger Sun During The Maunder Minimum Europe's so-called "Little Ice Age" (1645-1715) coincided with the Maunder Minimum -- a period during which sunspots were exceedingly rare. How was the sun different during the Maunder Minimum? This subject of solar variability (in both diameter and period of rotation) has been long debated. Some early measurements of solar diameter, begun at Greenwich in 1830, seemed to some to show a steadily shrinking sun, but others found cyclic patterns. E. Ribes et al have just presented some data on solar diameter actually taken during the Maunder Minimum. "By analysing a unique 53-year record of regular observations of the solar diameter and sunspot positions during the seventeenth century, we have shown for the first time that the angular diameter was larger and rotation slower during the Maunder Minimum." A larger sun might be cooler, providing less heat, thus accounting for climate changes. (Ribes, E., et al; "Evidence for a Larger Sun with a Slower Rotation during the Seventeenth Century," Nature, 326: 52, 1987.) Comment. Just why the sun expands and contracts over a period measured in hundreds of years is a major astro physical conundrum. Variation in solar diameter, 1860-1940. Arrows indicate sunspot maxima. (From ASO-X6 in The Sun and Solar System Debris). From Science Frontiers #51 ...
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... Science Frontiers ONLINE No. 56: Mar-Apr 1988 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Oceans From Space In keeping with the foregoing extraterrestrial flavor, we are happy to report that our oceans may be exogenous; that is, derived from extraterrestrial materials. Once again, comets seem to be the culprits. C.F . Chyba has examined the lunar impact record and derived an estimate of the total mass of objects impacting the moon during the (hypothetical) period of heavy bombardment 3.8 to 4.5 billion years ago. This allowed him to calculate the mass influx for the earth during this period. His conclusion: if only about 10% of the incoming mass consisted of comets (mostly ice), the earth would have acquired all its ocean water. (Chyba, Christopher F.; "The Cometary Contribution to the Oceans of Primitive Earth," Nature, 330:632, 1987.) Comment. Frank claims that the earth today is continually bombarded by small icy comets, which down the eons may have kept the ocean basins full. So, we have two possible extraterrestrial sources of oceans -- both of a cometary nature. It was only yesterday that the idea of ice surviving in outer space was ridiculed; no one even dreamed that our oceans could be composed of space ice! From Science Frontiers #56, MAR-APR 1988 . 1988-2000 William R. Corliss ...
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... been brought by comets that bombarded the planet early in its history. The models show that comets of moderate size would have slowed down enough during entry into the Earth's atmosphere for their organic component to survive the impact intact. .. .. . "The idea that comets supplied the Earth with the organic material needed to create life has been around for more than 20 years, but as often as some scientists have put forth the hypothesis, others have shot it down. "About 20% of comet nuclei are composed of organic matter, the rest ice and dust. Most of the organic component appears to be in a complex, polymerized form similar to kerogen, which is found in sedimentary rocks on Earth. From 4.33.7 billion years ago, during the period of heaviest bombardment by meteorites and comets, an estimated 1023 g of organic material would have been added to Earth by comet impacts had they made up 10% of the extraterrestrial flux. That is 1001000 times larger than most estimates of the photochemical production of the compounds over the same period." (Anonymous; "Comets and Life," Eos, no. 13, 1989.) Comment. Nowhere in the above article does one find the name of Fred Hoyle, whose ideas along these lines have been ridiculed for years. From Science Frontiers #63, MAY-JUN 1989 . 1989-2000 William R. Corliss ...
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