... Science Frontiers ONLINE No. 1: September 1977 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Ancient Iberian Jars Recovered Off Maine Coast While skindiving in the Bay of Castine in 1971, Norman Bakeman discovered two peculiar ceramic storage jars in 12 meters of water. These jars were recovered and have since been compared to Portugese "anforetas" used during the Roman period for the storage of wine, oil, honey, etc. A similar anforeta as also been recovered in Jonesboro, Maine. The clay paste and grit of the Maine jars closely resemble those used in Iberia almost 2,000 years ago. The possibility that these containers might be Spanish olive jars circa 1800 is also discussed. (Whittall, James P., II; "Anforetas Recovered in Maine," Early Sites Research Society, Bulletin, 5:1 , 1977.) Reference. These anforetas and other anomalous artifacts are cataloged in our Handbook: Ancient Man. Book details here . From Science Frontiers #1 , September 1977 . 1977-2000 William R. Corliss ...

... 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 Light Makes Bright As revealed in SF#116, the backs of our knees are strangely sensitive to light. Illumination of these regions somehow encourages our pineal glands to release melatonin. D. Jones has suggested a more direct way in which light can reach the pineal gland -- through our ears! The pineal gland, which is believed to be the relic of the third eye that our distant reptilian ancestors possessed, is now buried deeply in our brains. But, it is possible that light could reach it through the ears by diffusing through the soft, translucent tissues that lead into our skulls. A commercial opportunity arises here. Jones notes first that melatonin is a mood enhancer and stimulant. We all have read how depressed far-northern peoples become during their long winter nights; and we know first-hand how exuberant we are on bright spring days. Why not, asks Jones, manufacture "earlights" mounted on headbands? These would direct red light (which diffuses better through tissue) into the ears and thence to the pineal gland. People could thereby be made cheerful and enthusiastic whatever the season, weather, or time of day. We could dispense with all those mood-enhancing pills. (Jones, David; "The Seeing Ear," Nature, 391:541, 1998.) From Science Frontiers #117, MAY-JUN 1998 . 1998-2000 William R. Corliss ...

... Science Frontiers ONLINE No. 34: Jul-Aug 1984 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects The mind's control of bodily processes T.X . Barber has reviewed the role of the mind in the control of many physiological processes in a chapter appearing in a new book. The chapter is 58 pages long, with 176 references, making it a major contribution to the subject. To give the reader the flavor of this paper, two paragraphs are now reproduced: "The data presented in this chapter should, once and for all, topple the dualistic dichotomy between mind and body which has strongly dominated Western thought since Descartes. The meanings or ideas imbedded in words which are spoken by one person and deeply accepted by another can be communicated to the cells of the body (and to chemicals within the cells); the cells then can change their activities in order to conform to the meanings or ideas which have been transmitted to them. The believed-in (suggested) idea of being stimulated by a poison ivy-type plant, transmitted to a person who is normally hypersensitive to this type of plant, can affect specific cells (probably in the immunological and vascular systems) so that they produce the same type of dermatitis which results when the person actually is stimulated by a poison ivy-type plant. Similarly, individuals who are viewed as allergic to pollen or house dust may not manifest the allergic reaction when they believe (falsely) that they have not been exposed to the allergic substance. .. ...

... Science Frontiers ONLINE No. 34: Jul-Aug 1984 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Behind magnetic flip-flops The earth's magnetic field frequently reverses its polarity. Such flips can of-ten be correlated with climate changes, global ice volumes, sea-floor spreading rates, and deposition of black shales, tektite falls, biological extinctions, etc. The frustrating thing is the lack of clear-cut cause and effect; that is, how these phenomena are linked physically to the geomagnetic field. Part of the problem is that we can only guess at how the geomagnetic field is generated. Let us assume that the earth's magnetic field is created by dynamo action in the planet's fluid core. P. Olson finds analytically that the core dynamo may reverse sign due to fluctuations in core turbulence caused by two competing energy sources: heat loss at the mantle-core boundary and progressive growth of the inner core. In concept, the heat lost at the core-mantle boundary might be linked to climate changes and sea-floor spreading. Taking a different tack, D. Gubbins has investigated the possibility that field reversals are triggered by ice ages and meteorite impacts (tektite falls). The physical mechanism here would be the increase in pressure upon the core, which affects the rate of freezing in the outer core, and thus the power available to the core dynamo. Gubbins found that these externally caused pressure changes were too small to explain the polarity changes. However, the parameters involved ...

... 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 Glitches In The Terrestrial Conveyor Belt According to plate tectonics, the earth's continents are being transported -- very slowly -- on a subterranean conveyor belt of sorts. Although plate tectonics, nee continental drift, was ridiculed 50 years ago, it has been very successful in accounting for many geological phenomena. The theory is rarely challenged these days, but there are anomalies out there. "According to the simple plate-tectonic theory, the age of oceanic lithosphere is zero at a spreading oceanic ridge and increases with distance from the ridge. Thus the lithosphere of the central Atlantic, which current palaeogeographical reconstructions assure us began to open no earlier than 120 million years ago, has zero age at the Mid-Atlantic Ridge and, supposedly an age of about 120 million years close to the land masses of Africa and South America at the appropriate latitude. Yet, Bonatti and others (Nature, v. 380, p. 518, 1996) have now recovered samples of 140-million-year-old pelagic limestones not even from the edges of the Atlantic but right in the middle of the ocean, close to the ridge. How can this be possible?" The only explanation (? ) seems to be that this errant chunk of crust got "trapped" in the middle of the Atlantic -- like a misdirected suitcase on an airport conveyor belt. (Anonymous; "Old Rocks near the MidAtlantic Ridge ...

... 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 SKEPTIC'S NDE -- NOT SO MYSTICAL NDEs (Near-Death Experiences) profoundly affect those who recover to describe them. Prominent in most NDEs is the perception of traveling down a long tunnel. Those with a religion or mystical turn believe that this tunnel opens up into an afterlife or perhaps a continued existence on some other "plane." In a recent Skeptical Inquirer, L.D . Lansberry wrote of her personal NDE. It happened during angioplasty, when her heart stopped temporarily. Lansberry, a confirmed skeptic in such matters, has always maintained that the customary interpretations of NDEs are so much "tomfoolery." When she entered that famous NDE tunnel herself, she saw it close down around her as her heart stopped. Then, as the doctor brought her back, the tunnel opened up again and she saw a light at the tunnel's end, but it turned out to be only the light of the operating room. Lansberry asserts that there is nothing transcendental about the tunnel effect. She attributes the experience to the failure of neurotransmitters in the outer portion of her brain failing to fire, in effect creating a collapsing tunnel in her mind. Fortunately, her doctor reversed the effect. "When the tunnel closes," she wrote, we are dead." (Lansberry, Laura Darlene; "First-Person Report: A Skeptic's Near-Death Experience," Skeptical Inquirer ...

... Science Frontiers ONLINE No. 119: Sep-Oct 1998 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Some Green Flashes Are Yellow Rarely, green flashes are observed just as the tip of the setting sun disappears below the horizon. Most of these flashes have a perfectly good explanation. The earth's atmosphere acts like a prism and disperses the light of the sun into a spectrum, and the last portion of this spectrum that one usually sees is green. Conditions have to be just right, though. A flat horizon and a layer of warm air are important. But even when conditions seem perfect, the green flash does not always appear, and all one sees is the red tip of the sun sinking out of sight. Even if the patient observer is rewarded by a green flash, he may really have been deceived, for there are "false" green flashes. A. Young, San Diego State University, reported at a recent meeting of the American Astronomical Society on a peculiar type of optical illusion that can afflict observers of the setting sun. It seems that the intense red light of the sun near the horizon can bleach the red-sensitive receptors in the retina so that an intent observer becomes temporarily color blind to red. When this happens, the observer sees the yellow part of the dispersed solar spectrum as being green (yellow minus red = green). The true green flash may never have appeared at all. (Seife, Charles; "Don't Let Your Eyes Deceive You," ...

... Science Frontiers ONLINE No. 119: Sep-Oct 1998 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects The black death and ccr5-delta 32 Plagues are not all bad, and the Black Death (bubonic plague) that swept into Europe from Asia in 1346 was no exception. It is now common knowledge that bacteria, insects, plants, and even humans can build up resistances to poisons, diseases, and antibiotics. Mutations are always occurring; some good, some neutral, some bad. It has been found that a human mutation designated CCR5-delta 32 confers immunity to AIDS if inherited from both parents. People carrying the CCR5-delta 32 mutation lack the receptors to which the AIDS virus must attach itself if it is to infect the person. What has all this to do with the Black Death? "Although the origin of the mutation is obscure, it appears to have suddenly become relatively common among white Europeans about 700 years ago. That increase suggests that something must have occurred about that time to greatly favor the survival of people carrying the mutation." What biological catastrophe decimated Europe 700 years ago? The Black Death. One-quarter to one-third of the Europeans succumbed between 1347 and 1350. The Black Death strongly modified the European gene pool, increasing the frequency of CCR5-delta 32. This mutation may not have had any direct effect on the plague itself. It may just be a quirk of fate that the survivors of the Black Death had a higher frequency of the CCR5-delta ...

... 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 Might diamonds be dead bacteria?How can something as beautiful, pure, and crystalline as a diamond be made from dead, disgusting bacteria? In truth, all diamonds are full 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 # ...

... Science Frontiers ONLINE No. 74: Mar-Apr 1991 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Searching For Monster Sharks Tantalizing reports surface now and then lending crediblility to the claim that there exists a very rare, deepwater shark that rivals the blue whale in size. We are talking 50-foot sharks and larger here; sizes that make the hero (or heroine) of the Jaws series seem minnow-like. All of these hints come from the Pacific and focus on the possible survival of the shark Carcharodon megalodon , a monster relative of the great white shark. Megalodon is thought to have met its demise a million or so years ago. The word megalodon means "big tooth," and indeed the fossil teeth of this monster approach 6 inches in length. Sharks sporting teeth of this size could be as long as 50 feet. Measurements of the manganese dioxide layers accumulated on megalodon teeth dredged up from the seafloor suggest that it might actually have survived the Ice Ages and terrorized the Pacific as late as 10,000 years ago. Actually, some unfossilized teeth 5 inches long have been brought up by dredges, implying an even more recent existence. Do scuba divers have anything to fear today? There are rare reports of huge versions of a shark resembling the great white but without the high dorsal fin. So, if the shark of Jaws scared you, think what a 50-foot version with 5-inch, serrated teeth could do to you and your boat. (Shuker, Karl P.N ...

... 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 Mystery cloud of ad 536 "Dry fogs appear in the atmosphere when large volcanic eruptions inject massive quantities of fine silicate ash and aerosol-forming sulphur gases into the troposphere and stratosphere. Although the ash gravitationally settles out within weeks, the aerosols spread around the globe and can remain suspended in the stratosphere for years. Because solar radiation is easily absorbed and backscattered by the volcanic particles, a haziness in the sky and a dimming of the Sun and Moon are produced. Very dense and widespread dry fogs occur, on the average, once every few centuries. The sizes and intensities of some of the largest of them before the modern scientific era have been estimated by several indirect methods. The densest and most persistent dry fog on record was observed in Europe and the Middle East during AD 536 and 537. Despite the earliness of the date, there is sufficient detailed information to estimate the optical depth and mass of this remarkable stratospheric dust cloud. The importance of this cloud resides in the fact that its mass and its climatic consequences appear to exceed those of any other volcanic cloud observed during the past three millenia. Although the volcano responsible remains a mystery, a tropical location (perhaps the volcano Rabaul on the island of New Britain, Papua, New Guinea) can be tentatively inferred." (Stothers, R.B .; "Mystery Cloud of AD 536," Nature, 307:344, 1984.) Comment ...

... 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, ...

... 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 Oklo: An Unappreciated Cosmic Phenomenon In 1972, French scientists discovered that several natural concentrations of uranium ore had become critical and flared up some 2 billion years ago at Oklo, Gabon. The concentration and configuration of the natural uranium and surrounding materials at that time had been just right to sustain fission. In fact, the analysis of the nuclear waste in the burned rocks demonstrated that plutonium had also been created. This implies that natural breeder reactors are also possible, raising the possibility of hitherto unappreciated, long-lived heat sources deep in the earth, in the other planets, and inside some of the stars. Don't worry that the Oklo phenomenon might occur today on the earth's surface. The concentration of fissionable U-235 has fallen considerably in the last 2 billion years due to its radioactive decay. But, deep inside the earth and other astronomical bodies, nuclear criticality might still be possible due to different pressures, densities, etc. In a stimulating and generally overlooked paper in Eos, J.M . Herndon proffers four important natural phenomena that may involve natural fission reactors. Geomagnetic reversals . In the deep earth, where pressures and densities are high, natural nuclear reactors may generate intermittent bursts of heat -- just as they did at Oklo -- and thereby cause the earth's dynamo to falter and reverse. Planetary heating . Jupiter, Saturn, and Neptune emit much more energy than ...

... Science Frontiers ONLINE No. 61: Jan-Feb 1989 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Terrestrial maria?Those dark patches that constitute the face of the man-in-the-moon are really huge outpourings of lava. Once considered real seas, they are called "maria." Maria like those on the moon also exist on the earth. This is a surprise because terrestrial maria were never mentioned in my college geology courses. But, in those days, the one-mile-wide Meteor Crater, in Arizona, was the largest accepted consequence of celestial bombardment. Deccan basalt flows (also called the Deccan traps) in Western India, shown before the formation of the Carlsberg Ridge and teh splitting off of the the Seychelles. D. Alt and colleagues, at the University of Montana, have identified four large basalt plateaus that might be terrestrial maria: "Notable examples of large lava plateaus that resemble lunar maria include, among others, the Deccan Plateau of India, the Columbia Plateau of western North America, the Parana Plateau of South America, and the Tungusska Basin of Siberia. All consist mostly of basalt lava flows; those on continents include minor quantities of rhyolite, and variable amounts of sediment. All seem to have appeared suddenly, within plates. No consistent context of plate interactions explains them. We suggest that large lava plateaus are indeed terrestrial maria." Alt et al go on to show that these lava plateaus seem to have initiated continental rifts and hotspot tracks where none existed before. ...

... 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 Starlings Fall Out Of The Sky Late October, 1998. Tacoma, Washington. About 300 starlings dropped out of the sky on this date. Neither poison nor disease was the cause. The birds all suffered crunched chests and blood clots in hearts and lungs. Since starlings fly in tight formations, some speculated they had smashed into the side of a large truck (? ), or perhaps a wind gust had thrown them to earth violently. (Anonymous; "Bird Deaths Still Mystery," Houston Chronicle, October 31, 1998. Cr. D. Phelps. Also: Anonymous; "300 Starlings Drop out of Sky Dead," Scranton Times, October 31, 1998. Cr. M. Piechota.) Comment. A much greater avian catastrophe took place near Worthington, Minnesota, March 13-14, 1904. After a storm, dead and dying Lapland Longspurs were strewn over a wide area. A scientist from the Minnesota Natural History Survey marked off squares in the snow covering two frozen lakes and began counting and counting and counting. On the lakes alone, 750,000 Lapland Longspurs lay dead. It was estimated that 1,500,000 died just in the area around Worthington. The injuries of the longspurs were much like those suffered by the starlings. (Details in our latest catalog: Biological Anomalies: Birds) From Science Frontiers #121, JAN-FEB 1999 . 1999-2000 William ...

... 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 B-24 SIGHTS "CIRCLES OF LIGHT"The still-unexplained balls of light (" foo fighters") seen by Allied pilots over wartime Germany were duplicated in the Pacific. In addition, strange "circles of light" followed American aircraft. The following paragraphs were taken from the "Weekly Intelligence Summary," Headquarters, Eastern Air Command, South East Asia. June 1, 1945. "A B-24 of the 11th Bomb Group on a snooper mission over Truk during the early morning hours of 3 May 1945, encountered what may prove to be as baffling a phenomena (sic) as the balls of light seen by the B-29s while over the Japanese mainland. (Excerpted From Hq. AAF, POA, Air Intell. Memo No. 4, 8 May 1945.) "The B-24 first observed two red circles of light approaching the plane from below while still over the Truk atoll. One light was on the right and the other was seen on the left of the B-24. The light on the left side turned back after one and one half hours. The one on the right remained with the bomber until the B-24 was only 10 miles from Guam. From the time that the B-24 left the atoll, the light never left its position on the right side. It was reported by the crew members as sometimes ahead, sometimes behind, ...

... Science Frontiers ONLINE No. 122: Mar-Apr 1999 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects A REALLY MEANINGFUL COINCIDENCE "When Valdimir Gusiyev [a pseudonym] walked his dog each morning, he took a shine to a young woman he saw taking her small son to a nursery. The got talking, and within months the three were living together. "Then friends began to comment on how little Misha was the splitting image of his new father, and the local optometrist remarked that the boy had inherited his minor eye condition. Their words set Mr. Gusiyev's mind racing -- and apparently led to the discovery that there really was a family resemblance. He had fathered the child by donating sperm at the local fertility clinic in the town of Yaroslav." Gusiyev's new girl friend was a divorcee who had been married to an impotent man. She and her former husband had agreed to the artificial insemination before their divorce. A likely story? Genetic fingerprinting proved that Gusiyev was indeed the father of the child. As for the happy ending, Gusiyev and girl friend were soon married. (Blundy, Anna; "Fatherhood Takes on New Meaning for Sperm Donor," London Times, December 31, 1998. Cr. A.C .A . Silk.) From Science Frontiers #122, MAR-APR 1999 . 1999-2000 William R. Corliss ...

... Science Frontiers ONLINE No. 22: Jul-Aug 1982 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects The Nomads Within Us It was originally believed that human chromosomes were fixed at conception and all subsequent organic development proceeded from the instructions encoded on them. Biologists have recently discovered that genes grasshopper about, constantly modifying genetic instructions -- at least that's the current thinking. Additional modification of genetic instructions seems to be accomplished by entities called "nomads" or "mobile dispersed genetic elements." One type of nomad is a simple ring of DNA called a plasmid. Plasmids seem to be identical to a kind of virus called a retrovirus, which can penetrate into cells and tamper with gene expression; that is, the way genetic instructions are interpreted. Plasmids have been discovered in maize, fruit flies, bacteria, and, now, humans -- and healthy people at that. No one is quite sure what these plasmids do. Even though they look like retroviruses, they may not be associated with illness, but rather help organisms adapt to changing environments. But no one really knows. (Anonymous; "Human Wandering Genes Can Live on Their Own," New Scientist, 94:18, 1982.) Comment. So, the human body is not only beset by new genetic instructions and the static introduced by invading viruses and other disease agents, but it has an indigenous population of nomads continually fiddling with our cells' genetic instructions. Our bodies seem more like Grand Central Station with trains loaded with new biological ...

... Science Frontiers ONLINE No. 94: Jul-Aug 1994 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Flat-plate hail Fig 1. A typical flat-plate hailstone from the May 17, 1993 fall. May 17, 1993. Berkshire, England. "As the cold front passed over Woodlands St. Mary, west Berkshire (183 meters above sea-level), at 1555 GMT, there commenced a 3-minute duration fall of unusual, flat-plate hailstones, measuring some 12 mm wide by 2 mm thick. These plates were smooth and glassy in appearance (indicating conditions of 'wet' growth) but not perfectly round, taking on an eccentric, wheel-like structure; with a 'hub' and four-spoke formation of transparent ice, having opaque areas in between." (Anonymous; "Flat-Plate Hail -- 17 May 1993," Weather, 48:433, 1993.) Comment. Other instances of hail platelets and small ice sheets may be found under GWP4 in Tornados, Dark Days. Ordering information here . The spoke-like structure mentioned above, however, is most unusual. It is difficult to imagine a meteorological process that could create millions of hailstones -- all with this strange geometry. From Science Frontiers #94, JUL-AUG 1994 . 1994-2000 William R. Corliss ...

... 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 ...

... Science Frontiers ONLINE No. 61: Jan-Feb 1989 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Celestial burlesque?Astronomers have long wondered about Mercury. Its density (5 .44) is unusually high for such a small planet, and its orbit's inclination (7 ) and eccentricity (0 .206) are also anomalously high. In one blow. W. Benz, A.G .W . Cameron, and W. Slattery may have solved all three problems. Four frames from a computer simulation of proto-Mercury being stripped of its lighter, outer crust by a collision. Frame times are -1 , + 2.3 , + 7.7 , and + 41.7 minutes after impact. The dark molten sheet of iron in Frame #4 will collapse into a sphere, while the silicates will escape Mercury's gravitational pull. They think Mercury's original, lighter, silicate outer layers were stripped off during the impact of one of the small protoplanets that are thought to have swirled around the inner solar system shortly after its formation. Computations on a supercomputer revealed to these three researchers that, if the protoplanet had hit Mercury at between 20 and 30 kilometers/second, then its dense iron core would have survived pretty much intact. A lower velocity would not have stripped off the lighter outer layers; anything higher would have blasted the whole planet into smithereens. Calculations of this type also suggest that if a protoplanet the size of Mars had hit protoearth, it likewise would ...

... Science Frontiers ONLINE No. 123: May-Jun 1999 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Phantoms Of The Brain In his review of a book with the above title (by V.S . Ramachandran and S. Blakeslee), D. Papineau repeats three irresistible anecdotes from the book. The people involved had either lost limbs or were partially paralyzed, so these three tales are at once sad, bizarre, and amusing. The first two anecdotes involve amputees experiencing the phantom-limb phenomenon. The accepted explanation of this phenomenon is that the irritated stump of an amputee sends nerve messages that deceive the brain into signaling that the limb is there after all. Ramachandran, a neurologist, has shown that this theory is incorrect. Instead, he asserts, when the area of the brain assigned to the lost limb no longer receives sensory input from the area, it begins to react to sensory input arriving at adjoining areas in the brain. In other words, the idle area "overhears" nearby signals that are being processed and acts upon them in error. This view explains why by simply stroking a man who had lost an arm, Ramachandran discovered two virtual hands in the man's face and shoulder. A touch on the man's cheek brought the response, "You're touching my thumb." The second anecdote is explained by the fact that the area in the sensory cortex assigned to the genitals is located next to that for the feet. Genital stimulation of people who have lost a foot ...

... 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 Grand Canyon Shamed Again Exploration and mapping of submarine canyons cut into the continental shelves of Alaska and Siberia emphasize once again the colossal scale of these crustal gashes: "Erosion of some of the largest known submarine canyons has removed more than 20,000 km3 of former subduction margin between the Aleutian Islands and Cape Navarin, U.S .S .R . The canyons are incised as deeply as 2,400 m into Tertiary sedimentary and igneous rocks that make up the margin and attendant deep sedimentary basins along the outer Bering shelf. Cutting of the seven major canyons probably occurred during low stands of sea level when the Bering shelf was exposed to a depth of about -135 m, which allowed the ancestral Anadyr, Yukon, and Kuskokwim Rivers to carry large volumes of sediment to the outer shelf. Although their positions appear to be structurally influenced, the canyons apparently were cut by combinations of massive slumping and sliding of sediment deposited near the shelf edge and of scouring action of the resulting turbidity currents that carried debris to the abyssal sea floor, where deep-sea fans have formed." (Carlson, Paul R., and Karl, Herman A.; "Ancient and Modern Processes in Gigantic Submarine Canyons, Bering Sea," Eos, 64:1052, 1983.) Comment. The authors believe that submarine slumping and turbidity currents were sufficient to have eroded these huge canyons. Other geologists doubt this. The other ...

... 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 ...

... 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 Thou canst not stir a flower, without troubling of a star This poetic title from Francis Thompson tries to express the unity of nature from the smallest to the largest realms. One characteristic of the realms even smaller than that of the flower is the quantization typical of the subatomic world -- that is, microscopic nature. At the human locus in the dimensional scheme of things, quantization is difficult to detect outside the physics laboratory. Daniel M. Greenberger, perhaps with the above title in mind, asked whether quantization might not also exist in astronomy and cosmology -- that is, macroscopic nature. He has applied the principles of quantum mechanics to nature in-the-large where gravitational forces are dominant. (Gravitational forces are negligible in the subatomic world.) His math cannot be reproduced here. Suffice it to say that Greenberger has applied his findings to the absorption lines of quasars and the elliptical rings surrounding normal galaxies. Now, quasars and galaxies are far from atomic nuclei, being vast assemblages of diverse matter. Somewhat surprisingly, his equations are successful in predicting some features of these two macroscopic entities. (Greenberger, Daniel M.; "Quantization in the Large," Foundations of Physics, 13:903, 1983.) Comment. At the very least it is mindstretching to find that complex systems with millions of stars may exhibit quantum effects. With some relief, we note that like microscopic quantization effects ...