129 results found.
... Frontiers ONLINE No. 45: May-Jun 1986 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects The Exploding Lake August 15, 1984. The village of Njindom, Cameroon. About 11:30 PM, the villagers heard a loud explosion coming from Lake Monoun. Early the next morning, people in a van driving past the lake discovered the body of a motorcyclist. The air smelled like battery fluid. One of the van's occupants collapsed. The others ran for their lives toward Njindom. By 10:30 AM authorities had found 37 bodies along a 200meter stretch of road by the lake. Blood was oozing from the noses and mouths; the bodies were rigid; first-degree chemical burns were present. Also, animals and plants along the shore had been killed. On August 17, the lake turned reddish brown, indicating that it had been stirred up somehow. Although Lake Monoun is in a volcanic crater, chemical analysis of the water found little of the sulphur and halogens normally associated with volcanic action. However, the analysis did find a tremendously high level of bicarbonate ions, which form from the dissociation of carbon dioxide. One theory is that an earthquake disturbed the carbonate-rich deep water of the lake, which as it rose to the surface and lower pressures, released huge volumes of carbon dioxide -- something like opening a soda bottle. The resulting wave of water and cloud of gas caused the deaths and devastation. If there had been some nitric acid in the cloud, the burns could be ...
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... Comet nuclei, according to W. Hartmann and his colleagues, are colored by a brownishblack primordial organic sludge, and have the appearance of "a very dark Hershey bar." The use of the adjective "organic" may be premature, but in light of the next item, maybe not. (2 ) Carbonaceous chondrites . This well-known class of meteorites sometimes appears tarry and is characterized by carbon contents of up to 2% and more. The Japanese have just reported the analysis of Yamoto 791198, a carbonaceous chondrite picked up in the Antarctic. This meteorite is loaded with amino acids, 20 kinds of them. These extraterrestrial amino acids are not considered biogenic because they are half left-handed and half right-handed; whereas all amino acids synthesized by terrestrial animals, plants, etc. are left-handed. [This is obviously presumptious because we have no notion how extraterrestrial life works, assuming it exists at all.] (3 ) The rings of Uranus . Voyager photos reveal that these rings are composed of unknown dark material quite unlike that in the high-albedo (bright) rings of Saturn. References. (Kerr, Richard A.; "A Comet's Heart May Be Big But Black," Science, 229:372, 1985. Also: Emsley, John; "Amino Acids from Outer Space," New Scientist, p. 30, December 19/26, 1985. Also: Anonymous; "Fine Particles Viewed in Uranus' Rings Leave Scientists 'Happily Bewildered'." Baltimore Sun, January 28, ...
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... : Jul-Aug 1985 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Galapagos Younger Than Thought Marine stratigraphy, radioactive dating, and paleontology all point to the relatively recent emergence and biological colonization of the Galapagos. These islands are no older than 3-4 million years. The unique terrestrial life forms had to develop in less time than this. (Hickman, Carole S., and Lipps, Jere H.; "Geologic Youth of Galapagos Confirmed by Marine Stratigraphy and Paleontology," Science, 227:1578, 1985.) Comments. Several remarks seem appropriate here: (1 ) The varied fauna and flora of the Galapagos did not evolve independently; viz., the bills of the Darwin finches are tailored to specific food sources (plants). Many species changed rapidly and in concert. (2 ) A recent Science article (228: 1187, 1985) notes that inbred mice often evolve different morphological characteristics very quickly. This observation probably applies to the initial Galapagos populations, which must have been small and inbred. (3 ) Harking back to the item on the Guadeloupe skeleton, the Galapagos display similar strata of limestone, beach rock, etc. Until now, the limestones had been dated from the Miocene to the Pleistocene, but according to Hickman and Lipps they must be much younger than Miocene. The Guadeloupe dates may also be in error. Caveat emptor. From Science Frontiers #40, JUL-AUG 1985 . 1985-2000 William R. Corliss ...
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... related to watercourses. Also, many of the lines definitely functioned as footpaths. It was also apparent that the animal figures, which were laid down much earlier than the line systems, were not related conceptually to the line scheme. Aveni concluded: ". .. whatever the final answer may be to the mystery of the Nazca lines, this much is certain: the pampa is not a confused and meaningless maze of lines, and it was no more intended to be viewed from the air than an Iowa wheat field. The lines and line centers give evidence of a great deal of order, and the well-entrenched concept of radiality offers affinities between the ceque system of Cuzco and the lines on the pampa. All the clues point to a ritual scheme involving water, irrigation and planting; but as we might expect of these ancient cultures, elements of astronomy and calendar were also evident." (Aveni, Anthony F.; "The Nazca Lines: Patterns in the Desert," Archaeology, 39:33, August 1986.) Reference. For more on the Nazca lines and other "geoglyphs," see our handbook Ancient Man, which is described here . Monkey effigy and geometric patterns in the Nazca line complex, Peru. From Science Frontiers #47, SEP-OCT 1986 . 1986-2000 William R. Corliss ...
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... 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 Biological Diversity Crisis If life fills all available energy niches, life must be capable of transforming itself (or of being transformed) into a multitude of different energy transducers or energy utilizers. E.O . Wilson has outlined the diversity of terrestrial life in a recent issue of BioScience. The earth, it appears, is a veritable Gene sis Machine; and it is only one planet among a possible infinitude. So many terrestrial species have already been described that one could easily believe that biological collectors roaming the planet's wild places have just about completed their task. Some recent totals: 47,000 species of vertebrates, 440,000 plants, and 751,000 insects. But we may not even be close to grasping life's diversity on earth! We do well in counting the large mammals and birds, but most insects and microscopic forms of life have escaped description. To illustrate, in 1964, the British ecologist C.B . Williams, combining intensive local sampling and mathematical extrapolation, extimated the insect population as 3 million species. However, by 1985, this figure has been raised ten-fold to 30 million species. Why the huge jump? For the first time, entomologists had found a way to efficiently sample the canopies of tropical forests. This rich stratum between the sunlight and gloomy forest floor 100+ feet below had been largely neglected before. The slick tree trunks and the attacking swarms of ...
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... Issues This Issue Sourcebook Project Sourcebook Subjects An Animal That Photosynthesizes At a recent meeting of the American Society for Photobiology, chemist Pill-Soon Song, of Texas Tech University, reported the discovery of a blue-green, trumpet-shaped protozoan that employs photosynthesis to sustain itself. Called Stentor coeruleus, this protozoan is only 0.2 mm long and swims backward by rotating its cilia. According to the article, this is the first instance of a photosynthesizing animal. (Anonymous; "Animal That Lives on Light," San Francisco Chronicle, June 28, 1985, p. 2. Cr. J. Covey) Comment. Nothing was said about whether the protozoan also ate food in the conventional manner. If verified, this is not a trivial discovery. Of course, some plants eat meat, but animals seem to have found sunlight too weak to utilize for mobility and other energy-rich processes and activities. From Science Frontiers #41, SEP-OCT 1985 . 1985-2000 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. 25: Jan-Feb 1983 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Promiscuous Dna The cells of plants (photosynthetic eukaryotes) are genetically the most complex that biologists have discovered. Each cell has three genetic systems: its own, that of the chloroplasts; and that of the mitochondria. It is supposed that the chloroplasts and mitochondria were once free-living cells that linked up with the embryonic plant cell to form a symbiotic partnership, with the host "plant" cell being the dominant member. Up until now, the three genetic systems were thought to be discrete, each going down its own pathway. But chloroplasts genes have now been found inside plant mitochondria, overturning conventional wisdom. To sum it all up, DNA seems promiscuous -- no respecter of privacy and breaking down all isolating genetic barriers. This discovery at once raises a dozen questions. For example, are mitochondria genes in chloroplast cells? How far does this promiscuity go? Can the same thing happen in higher organisms; say, with humans and symbiotic microorganisms or even not-so-symbiotic disease organisms? Is there no stopping this DNA? (Ellis, John; "Promiscuous DNA -- Chloroplast Genes inside Plant Mitochondria," Nature, 299:678, 1982.) From Science Frontiers #25, JAN-FEB 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 The Arctic Womb "Magnetostratigraphic correlation of Eureka Sound Formation in the Canadian High Arctic reveals profound difference between the time of appearance of fossil land plants and vertebrates in the Arctic and in mid-northern latitudes. Latest Cretaceous plant fossils in the Arctic predate mid-latitude occurrences by as much as 18 million years, while typical Eocene vertebrate fossils appear some 2 to 4 million years early." (Hickey, Leo J., et al; "Arctic Terrestrial Biota: Paleomagnetic Evidence of Age Disparity with Mid-Northern Latitudes During the Late Cretaceous and Early Tertiary," Science, 221:1153, 1983.) Comment. The anomaly here is in the vision of the high Arctic lands basking in the warm sun busily evolving new life forms well in advance of their appearance in lands closer to the Equator. What happened to the earth's axial tilt. These fecund polar territories should have been engulfed in darkness almost half of the year -- hardly an environment for precocious plant evolution. Further, trees found buried in the Arc-tic muck could never have grown where found due to the long polar darkness. From Science Frontiers #30, NOV-DEC 1983 . 1983-2000 William R. Corliss ...
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... 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. .. .. . "Believed-in suggestions can affect specific parts of the body in very specific ways. Suggestions of being burned can give rise to a very specific irregular pattern of inflammation on the hand that closely follows the pattern of a previously experienced actual burn in the same place. Suggestions that a congenital ...
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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 Gravity And Going Around In Ellipses We thought that our readers might like to know that the force of gravity apparently has no significant effect on circumnutation. Now circumnutation is the result of an "impressively ubiquitous mechanism" in all elongating plant organs. More simply, it is the elliptical weaving motion seen in the tips of growing leaves, shoots, flower stalks, branch roots, etc. In a 4- to 5-day-old sunflower seedling, the ellipse traced is 6-8 millimeters long and takes about 110 minutes. The ellipses result from differ-ential growth in the elongating plants. No one knew whether the force of gravity played a role in circumnutation until some sunflower seedlings were flown on Spacelab 1. Zero-g did not affect circumnutation at all. (Brown, Allan H. and Chapman, David K.; "Circumnutation Observed without Significant Gravitational Force in Spaceflight," Science, 225:230, 1984.) Comment. Nature seldom indulges in frivolous actions, but we just may have a phenomenon here that has absolutely no deeper significance. From Science Frontiers #35, SEP-OCT 1984 . 1984-2000 William R. Corliss ...
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... evolutionary development. They permit the geographical dispersal of many species, especially insects. But nature, ever-innovative, has other aeronautical techniques up her sleeve. Consider the tiniest insects that do not possess wings. It is difficult for large animals like ourselves to realize that these tiny creatures are actually prisoners of the so-called "boundary layer" of air hugging all surfaces. The thin boundary layer is stagnant very close to the surface. Any tiny in-sect wishing to take advantage of wind-dispersal to propagate the species farther afield must somehow breach this layer. Some of the scale insects have in their instar phases developed the trick of rearing up on their hind legs, penetrating the boundary layer, and presenting a high-drag surface to the wind. (Many climb along plant surfaces inside the boundary layer to exposed areas before exhibiting this behavior.) The wind plucks them off the plant and carries them off to new territories. The authors think this may be convergent evolutionary strategy for many minute insects. (Washburn, Jan O., and Washburn, Libe; "Active Aerial Dispersal of Minute Wingless Arthropods.....," Science, 223:1088, 1984.) Comment. The fact that these insects are shaped like airfoils (i .e ., aircraft wings) is also interesting. Scale insects (first instar phase). A. In the slow-moving boundary layer. B. Rearing through the boundary layer to present a high-drag cross section to the wind. From Science Frontiers #33, MAY-JUN ...
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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 Cancer: the price for higher life?For unknown reasons, plants and the simpler animals, such as sponges and jellyfish, do not get cancer. But all laterally symmetric organisms are prone to cancer. According to James Graham, the acquisition of cancer-initiating onco-genes by organisms (also an unexplained event) has forced these afflicted organ-isms to develop all sorts of defenses against external forces which might, with the help of the oncogenes, trigger cancer. Typical biological defenses include systems to insure accurate replication of cells, to destroy transformed cells, and to protect or immunize the organism against invading systems. Efficient im-mune systems in turn permitted life to invade mutagenic environments (such as sunlight) and to shed restrictive body coverings. In other words, cancer may have been a blessing in disguise -- the price of higher life| (Anonymous; "Cancer: The Price for Higher Life?" New Scientist, 99:766, 1983.) Comment. Note how easy it is for us to say "developed" this or that characteristic in response to some applied force. Exactly how such responses are made is a major mystery. And why do oncogenes exist? Are they a product of chance? They hardly confer short-term survival capability. Reference. The existence and insidious-ness of cancer pose many questions. These are broached in BHH23-35 in our catalog: Biological Anomalies ...
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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 Land animals: earlier and earlier Two biologists looking for plant fossils in the Catskills found instead the remains of ancient centipedes, mites, and spider-like creatures -- a classical case of serendipity. These animals were in a Devonian formation dated at 380 million years. It turned out that they were the oldest fossils ever found of purely land animals. (Some fossil animals of about the same age are known in European rocks, but in semiaquatic environments.) Two aspects of the fossils are of special interest: The animals found were already well-adapted to terrestrial life, inferring that the (assumed) invasion of the land from the sea has to be pushed back much farther in time; and Many of the fossil animals are essentially identical to modern forms, suggesting that little if any evolution has occurred in 380 million years. (Anonymous; "Fossils found in N.Y . Alter Scientists' View," Baltimore Sun, May 29, 1983. Comment. Note the sudden jump from no land animals to well-developed, frozen-in-time land animals. From Science Frontiers #28, JUL-AUG 1983 . 1983-2000 William R. Corliss ...
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... Science Frontiers ONLINE No. 29: Sep-Oct 1993 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Satan's storm June 1960. Kopperl, Texas. Thunderclouds and lightning gave way to winds in excess of 75 mph, with temperatures of up to 140 F. Surveying the storm damage later: "Aside from the expected remains of a severe wind storm -- uprooted trees, snapped telephone poles, roof damage and banged-up boats docked lakeside -- the area had the ironic appearance of having been stung by a June freeze. Tree leaves, shrubs, hanging plants and crops were curled and wilted, as if frost-bitten. Uncut Johnson grass was dried and ready to bale, although the hay normally required two or three days of drying time after being cut. Perhaps the most startling remains of the storm was in what had been the cotton patch at Pete and Inez Burns' farm. The cotton was about knee high and a 'lucious crop' the day before, according to the couple. The next morning all that was left were carbonized stalks peeping out of the ground. The corn fared little better." (Glaze, Dean; "Kopperl's Close Encounter with Satan's Storm," Meridian (TX) Tribune, May 12, 1983, p.1 . Article appeared originally in the Dallas Times-Herald Westward Magazine. Cr. J. Mohn) Comment. The consequences of this storm closely resemble the burning and drying effects of some tornados. See GWT in our ...
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... Science Frontiers ONLINE No. 36: Nov-Dec 1984 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Is a dog more like a lizard or a chicken?Cladism has been around since at least 1950, when the German entomologist William Hennig began classifying organisms in a new way. "His method was simple: classifications of animals and plants should be based on an assessment of their characters, and only advanced, or derived, characters (synapomorphies) should be used. For example, the character 'possession of feathers' is a synapomorphy shared by all birds that is found in no other organisms; it is used in classification to define Class Aves. All birds have a backbone too, but that is a primitive character for birds because it is seen in all other vertebrates. Primitive characters are of no use in defining a monophyletic group." Early on, cladism ignited many fireworks in the biological community. Today, cladism has become quite respectable. The cladists, however, are now fighting among themselves. One camp draws their "cladograms" (see illustration) using evolutionary theory as a guide. The other side believes that the cladograms should be drawn up first, based only upon actual characters and ignoring the theory of evolution -- let the species fall where they may. When evolutonary theory is omitted in the deliberations, radically different cladograms result. Mammals then seem more closely related to birds than reptiles, for example, as expressed in the illustration. A key connecting character here is mutual warmbloodedness. The shifting of ...
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... parasites really the masters?All animals harbor parasites; and some parasites even have their own parasites. The usual effect of a parasite upon its host is debilitation, often to the point of death. But parasites have to reproduce, and some settle for the modification of their hosts in ways that improve their chances. Parasites can change the size, color, and even the behavior of their host. The object is usually to encourage a specific predator to eat the host so the parasite can continue its life cycle. A classic example is the lan-cet fluke which infests ants and then sheep. The problem is that sheep don't normally eat ants, giving the flukes a chance to switch vehicles. So, the innovative flukes somehow force the ants to crawl to the tops of plants and lock themselves there with their jaws. The next hungry sheep that comes along has his meal seasoned with ants. The bulk of the present article deals with thorny-headed worms, which are not as endearing as the lancet flukes. These parasites are merely bags of reproductive organs attached to a thorny probiscus, by which they attach themselves to the intestinal walls of vertebrates. Living in a sea of processed nutrients, the worms don't even have a digestive tract. Part of the life cycle of this parasite is spent in arthropods (insects, crustaceans). As with the lancet fluke, the thorny-headed worm's big challenge is getting the arthropod eaten by a vertebrate. In most instances, it alters the behavior of the arthropod in a way that makes it ...
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... 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 Life In The Dark Two most interesting discovery have been made recently in deep ocean waters. First, abundant plant life has been found at depths of up to 268 meters, well beyond the 200-meter limit biologists had set based on the availability of sunlight. It wasn't difficult to discount photosynthetic life at 268 meters, because light there is only 0.0005% that at the surface. But there it was; and it may be found even deeper now that we've taken off the blinders. (Littler, Mark M., et al; "Deepest Known Planet Life Discovered on an Uncharted Seamount," Science, 227:57, 1985.) The second discovery came at 10,000 feet in the Gulf of Mexico. There, scientists in the submersible Alvin found a well-developed community of large clams, crabs, mussels, and tube worms, which closely resembles those around the Pacific hydrothermal vents. These life colonies do not use sunlight at all, nor do they depend on other life forms based on solar energy. They employ chemosynthesis, and the hydrogen sulfide and other substances in the vented waters replace sunlight. Although there are no obvious vents at the Gulf of Mexico site, the waters there contain plenty of hydrogen sulfide, indicating seepage from somewhere. The life forms are all new to science, although they resemble those in the Pacific. (Anonymous; "Worms without ...
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... the cell that monitors genomic activities and corrects common errors, senses unusual and unexpected events, and responds to them, often by restructuring the genome. We know about the components of genomes that could be made available for such restructuring. We know nothing, however, about how the cell senses danger and instigates responses to it that often are truly remarkable." Thus Barbara McClintock ends the paper she delivered in Stockholm when she received a Nobel Prize in 1983. Most of McClintock's paper reviews her pioneering work with the corn genome, but she adds some examples of other genomic responses to external stresses. One such stress is applied to an oak tree when a wasp lays its egg in a leaf. The stress causes the oak genome to reprogram itself and construct a wholly new and unplanned plant structure to house and feed the developing insect. Some of these structures (galls) are very elaborate and are precisely tailored to each different wasp species. From such examples, it is apparent that the genome of an organism somehow perceives stresses and reacts to them -- often in completely unanticipated ways. The stresses may be mechanical, thermal, chemical; in fact, almost anything. McClintock's conclusion is: ". .. that stress, and the genome's reaction to it may underlie many formations of new species." (McClintock, Barbara; "The Significance of Responses of the Genome to Challenge," Science, 226:792, 1984.) Comment. The implications here are broad and deep. Evolution can be driven by external stresses. The new ...
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... 20, September 13, 1984.) The Asiatic freshwater clam has spread rapidly across North America since its accidental introduction about 50 years ago. In addition to its natural dispersal via its more mobile larvae, the young adult clams have a surprising method of hitchhiking rides on the water currents. Through their siphons they deploy long mucous threads. Water currents pull on these threads just as air currents catch the silken threads of migrating spiders. Given a water current of 10-20 cm/sec, the small clams manufacture and deploy their threads, and off they go downstream. (Prezant, Robert S., and Chalermwat, Kashane; "Flotation of the Bivalve Corbicula Fluminea as a Means of Dispersal," Science, 225:1491, 1984.) Australia boasts many peculiar animals and plants. One of these is an orchid that grows underground. Obviously this orchid cannot employ photosynthesis. Rather, it grows in conjunction with a fungus that obtains nutrients from surrounding roots. The fungal threads penetrate both roots and orchids. The orchids make ends meet by systematically killing and digesting the nutrient-laden fungal threads. When the orchid flowers, it pushes toward the surface just enough to open some tiny cracks in the earth. In these cracks, still below the surface, appear the tiny burgundy red flowers. These flowers are pollinated by minute flies, but just how the orchid's seeds are dispersed is still a mystery. (Cooke, John; "Hidden Assets," Natural History, 93:75, October 1984.) Bats navigate by somehow constructing an image of ...
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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 More Doubts About Asteroids In an apparent reaction to the stampede to climb aboard the extinction-by-asteroid bandwagon, dissenting papers have begun to appear in the scientific literature. For example, Van Valen's list of objections to the hypothesis of asteroid impact at the Cretaceous-Tertiary boundary was reproduced in the last issue of Science Frontiers. Now, in a recent issue of New Scientist, T. Hallam raises still more objections: Tropical plants, mammals, crocodiles, birds, and benthic invertebrates were little affected by whatever happened at the Cretaceous-Tertiary interface. Furthermore, many groups that were extinguished were already well into a decline. Some geologists insist that some of the supposedly synchronous extinctions were probably separated by several hundred thousand years; viz., plankton and dinosaurs. The vaunted iridium anomaly in deep-sea cores is spread through a considerable thickness of sediment. Even after allowing for the mixing of sediments, the iridium-rich layer is thousands of years thick. According to the asteroid scenario, the clay layer separating the Cretaceous from the Tertiary should represent the fallout from impact-raised dust, which would include asteroidal material and a mixed sample of earth rocks. However, in Denmark, the boundary is marked by the so-called Fish Clay, which is almost pure smectite -- a single mineral and not a mixture of terrestrial rock flour. If it wasn't an asteroid impact, why the ...
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... Science Frontiers ONLINE No. 16: Summer 1981 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Plants Manufacture Fake Insect Eggs Plants are usually considered rather passive to environmental forces, but careful observation show that they fight back against predators in subtle ways. Williams and Gilbert, for example, have found that a number of Passiflora species, which are heavily defoliated by the larvae of Heliconius butterflies, have developed tiny structures that closely resemble in size, shape, and color the eggs of these butterflies. Heliconius butterflies, when searching for likely plants on which to lay eggs, tend to avoid plants that already have eggs on them. The plants' fake eggs, then, help protect the plant from predation. (Williams, Kathy S., and Gilbert, Lawrence E.; "Insects as Selective Agents on Plant Vegetative Morphology....."; Science, 212:467, 1981.) Comment. We have heard over and over again about Nature's "marvelous adaptations," but it is still difficult to imagine chance-driven evolution of fake eggs of just the right size, shape, and color. How many shapes and colors were tried before the plants got it right? From Science Frontiers #16, Summer 1981 . 1981-2000 William R. Corliss ...
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... Science Frontiers ONLINE No. 9: Winter 1979 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects The Ancient Dispersal Of Useful Plants George F. Carter, a noted geographer, summarizes the botanical evidence for early transoceanic voyages. Domestic cotton. Thousands of years old in the Americas; believed to be a hybrid between New World wild cotton and species from southwest Africa. Bottle gourds. Of African origin but known in Peru about 11,000 years ago; dispersible by ocean currents but appeared in Peru only after humans learned how to navigate on the oceans. Sweet potatoes. A New World plant that has been known in Polynesia for at least 500 years; but the South American name for the sweet potato (kumara) turns out to be a Sanskrit word from India, which is most perplexing. Coconuts. Arrived in the Americas from the Indian Ocean region via Polynesia; can be dispersed by ocean currents, but this long eastward voyage would have been counter to many currents. Peanuts. Well-established on the Peruvian coast thousands of years ago, but the same variety was known in preShang China before 1500 BC. (Carter, George F.; "Kilmer's Law: Plant Evidence of Early Voyages," Oceans, 12:8 , 1979.) Reference. Our Handbook Ancient Man contains much more evidence for Precolumbian contacts with the New World. Information on this large volume is located at: here . From Science Frontiers #9 , Winter 1979 . 1979-2000 William R. Corliss ...
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... Science Frontiers ONLINE No. 12: Fall 1980 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Oh, those clever plants The Lecythidaceae or Brazil nut family is pantropical in distribution. Some members of this family produce two dif ferent kinds of pollen: (1 ) normal pollen for fertilization; and (2 ) nongerminating pollen that is collected by insects for food. The latter variety of pollen is considered (anthropomorphically) as the plant's way of rewarding insects for carrying the fertile pollen to other plants. As in so many of Nature's remarkable adaptations, the two types of pollen are located in exactly the right portions of the flower to match the anatomy of the foraging insect. In the figure, a carpenter bee collects infertile pollen from the bottom of the flower while being dusted on the head and back by the regions of the fertile pollen. (Mori, Scott Alan, et al; "Intrafloral Pollen Differentiation in the New World.. .. ." Science, 209:400, 1980.) Comment. How can the flower, even over many generations, determine that only the pollen from the upper portion is being used for fertilization and that the lower area of pollen may safely "be allowed" to become infertile? From Science Frontiers #12, Fall 1980 . 1980-2000 William R. Corliss ...
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... Science Frontiers ONLINE No. 23: Sep-Oct 1982 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Remarkable Engineering Design In Nature Two unusual examples of inspired design in nature have been described recently: (1 ) The swordfish possesses special tissues rich in mitochrondria and cytochrome-c that generate heat for the animal's eye and brain. Not only do these heating elements keep the swordfish eye and brain significantly warmer than the surrounding water but they also keep these organs warm and thus more effective during deep dives into the cold ocean depths. (Carey, Francis G.; "A Brain Heater in the Swordfish," Science, 216:1327, 1982.) (2 ) Plants, it seems, developed light pipes long before humans. Certain plant tissues (etiolated or dark-grown) act as multiple bundles of optical fibers and coherently transfer light over distances of at least 2 cm. Optical tests show that these natural light pipes are much more effective transmitters of light than media that simply scatter light. This unsuspected sophistication of Nature's design may require significant revisions in photobiology, which did not allow for such ingenuity. (Smith , Harry; "Light-Piping by Plant Tissues," Nature, 298:423, 1982.) Comment. Since some plants are known to emit light, we would not be surprised, the way things are going, to learn of natural plant lasers! From Science Frontiers #23, SEP-OCT 1982 . 1982-2000 William R. Corliss ...
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... Science Frontiers ONLINE No. 14: Winter 1981 Supplement Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Worms with inside-out stomachs The recently discovered tube worms, living near the hot water vents on the ocean bottom off the Galapagos, have no mouths or guts. Their bodies are covered with thousands of feathery tentacles, each packed with blood vessels. Apparently, the tube worms extract nutrients directly from the sea water and expel wastes the same way -- having in effect external stomachs. These worms, which may be many feet long, contain enzymes that permit them to extract carbon dioxide from the seawater and fix it much like plants do during photosynthesis. George Somero, at Scripps, estimates that the enzyme levels in the worms are similar to those in a spinach leaf. (Anonymous; "15-Foot Sea Worm Has Plant Qualities," San Diego Evening Tribune, May 22, 1980. UPI dispatch) Comment. This curious biological anomaly developed in an ecological niche where the primary energy source for sustaining life is geothermal rather than solar. How did this remarkable situation arise? Do the tube worms have relatives in the fossil record showing a step-by-step development of inside-out stomachs? From Science Frontiers #14, Winter 1981 . 1981-2000 William R. Corliss ...
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... Science Frontiers ONLINE No. 12: Fall 1980 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Static on the hare-lynx cycle signal Almost all ecology textbooks present the 10-11 year hare-lynx cycle as a classic case of prey-predator oscillations. The major data source for such population studies is the record of pelt sales rather than actual field observations. Looking beyond such superficial information, researchers have discovered that the quantity of pelts offered for sale by the Indians depends upon the amount of time they can divert to hunting pelts. This, in turn, is affected by the abundance of food animals, such as moose and hares. It is food first and pelts second. Furthermore, when the plants consumed by hares are overbrowsed during periods of dense hare population, they defend themselves by generating resins and other compounds toxic or repellent to hares. Thus, the hare abundance cycle is affected by: (1 ) Plant defenses; (2 ) Indian hunting strategies; and (3 ) The lynx. (May, Robert M.; "Cree-Ojibwa Hunting and the Hare-Lynx Cycle,: Nature, 286: 108, 1980.) Comment. Here is another case where the attractiveness of a theoretical model has dampened further inquiry. From Science Frontiers #12, Fall 1980 . 1980-2000 William R. Corliss ...
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... Science Frontiers ONLINE No. 12: Fall 1980 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects The earth's ring The most profound climatic event of the Tertiary was the terminal Eocene event 34 million years ago. The sudden change in the abundance of forest plants suggests that the winters became much more severe while the summers remained about the same. At about the same time, the radiolaria were devastated by some sort of disaster. This was also the time when the North American tektite strewn field was deposited -- a field that stretches halfway around the world. John O'Keefe hypothesizes that some of the tektites and microtektites that rained down during this period missed the earth and went into orbit around it, forming an opaque Saturn-like ring. This ring might have lasted a million years or more; and its shadow could have caused the extrasevere winters postulated from botanical data. (O 'Keefe, John A.; "The Terminal Eocene Event; Formation of a Ring System around the Earth," Nature, 285:309, 1980.) Comment. Many who have previously speculated about terrestrial ring systems, such as I.N . Vail, were called pseudoscientists! Reference. The North American tektites are the subject of Section ESM3 in our Neglected Geological Anomalies. Ordering information here . Earth's ring shadow From Science Frontiers #12, Fall 1980 . 1980-2000 William R. Corliss ...
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... Science Frontiers ONLINE No. 7: June 1979 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Where did chief joseph get a cuniform tablet?Among the effects of Chief Joseph, the famed leader of the Nez Perce Indians, was a clay tablet bearing a cuneiform inscription. The tablet transmits no startling message, being merely a receipt for one lamb changing hands. But where did a Northwest Indian chief get a 3,000year-old tablet? The tablet first came to light around 1878, long before cuneiform tablets became common on the artifacts market. Still, it could have been a gift from some missionary or tourist -- or even planted as a hoax. (Park, Edwards; "Where Did Chief Joseph Get a Cuneiform Tablet?" Smithsonian Magazine, 9:36, February 1979.) Reference. For other enigmatic New World tablets and inscriptions, read our Handbook: Ancient Man, which is described at: here . From Science Frontiers #7 , June 1979 . 1979-2000 William R. Corliss ...
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... Science Frontiers ONLINE No. 13: Winter 1981 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Terrestrial Life Older Than Expected The oldest fossils found so far are dated at 3.5 billion years ago. Discovered in Australia, these life forms seem to have been capable of synthesizing their own food, much like present-day plants. In other words, these life forms were not so primitive after all. If we are to assume that still simpler life and pre-life chemical evolution preceded these fossils, the advent of life on earth must be pushed back much farther to allow time for gestation. (Anonymous; "Oldest Life-Forms May Have Made Own Food," Eos, 61:578, 1980.) Comment. Another possibility is that life did not originate on earth and was instead brought here on comets, meteorites, etc. From Science Frontiers #13, Winter 1981 . 1981-2000 William R. Corliss ...
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... been known; but the new-found complexity and interdependency of life systems within life systems is remarkable. The researchers believe that the life forms inside the termite work together to create the uniform internal environment needed by all inhabitants, just as the termites themselves cooperate to maintain a favorable environment inside their hill. (Anonymous; "And Littler Bugs Inside 'Em," Scientific American, 246:78, February 1982.) The termites, though, are only part of a much larger ecosystem, the earth itself. J.E . Lovelock, in his Gaia, A New Look at Life On Earth, has observed that our planet's environment has actually changed little down the eons despite solar variations. Lovelock's hypo thesis is that all terrestrial life -- animals, plants, termites, etc -- work sym biotically to maintain planetary temperatures, atmospheric constituents, etc., conducive to life, just like the termite's internal residents on a much smaller scale. The Gaia concept was restated by R.A . de Bie in a letter to Nature about the possibility of life in outer space. He observes that terrestrial life, according to Gaia-thought, will naturally develop a species that can carry life off the planet to new and safer environs. Humankind, of course, is the first attempt we know of to create such an agent. Other planetary systems might have differently constituted agents. (de Bie, Roeland A.; "The Ultimate Question," Nature, 295:8 , 1982.) Comment. To extend the ...
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... haphazard doodlings of unaccomplished primitives. We quote from the author's abstract: "A recently discovered sheltered rock scar with red pictographs, in Jalisco, west Mexico, is a major addition to the rather meager data on pictographs in Mesoamerica. It appears to contain a complex set of data pertaining to the cosmology of the relatively unknown Indians who inhabited the Jalisco coast during the last Pre-Hispanic period. Analysis of the scar has incorporated both the artistic symbolism of the nearby Huichol Indians, and concepts developed through archaeoastronomy. This analysis suggests that the ceiling pictographs record the use of sky transits of the sun, Venus, or the constellation Orion as wet season/dry season calendric markers. Wall pictographs show the sun on the mountainous horizon, below which is the earth filled with symbols of plants and animals, among these stand shamans calling down the life-giving rain from the god(s ) of the sky. I also explore the possibility that one of the ceiling pictographs is a record of the appearance of the Crab supernova in the sky in A.D . 1054." (Mountjoy, Joseph B.; "An Interpretation of the Pictographs at La Pena Pintada, Jalisco, Mexico," American Antiquity, 47:110, 1982.) Reference. Petroglyphs and other forms of ancient writing are covered in our Handbook: Ancient Man. Ordering data at: here . From Science Frontiers #20, MAR-APR 1982 . 1982-2000 William R. Corliss ...
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... growing cells apparently generate electrical fields that control the shapes of living organisms. They have been experimenting with a disc-shaped alga with a lobed edge. Normally the algo reproduces by splitting in half, with each half regenerating the lost half. Nicely symmetric discs are manufactured. But if an external electrical field (about 14 volts/cm) is applied across the nutrient medium, the regeneration geometry is distorted. The experimenters surmise that the membrane chemistry is affected by the external field which augments or reduces cell-created electric fields. (Anonymous; "Electric Charges May Shape Living Tissue," New Scientist, 86:245, 1980.) Comment. Natural external electric fields, such as the atmospheric potential gradient, may therefore have some biological effects, as some experiments with electricity and plant growth have proven. From Science Frontiers #12, Fall 1980 . 1980-2000 William R. Corliss ...
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... Science Frontiers ONLINE No. 15: Spring 1981 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects If bacteria don't think, neither do we As one goes step-by-step down the ladder of biological complexity, one discovers that flatworms, plants, and even bacteria display purposeful behavior. Bacteria, which are usually regarded as fairly inert when it comes to responding to environmental pressures, actually react in different ways to dozens of different stimuli. This ability at the very least requires sensory equipment, internal clocks, a memory, and a decision-making capability. If bacterial activity is all preprogrammed (the reductionist view), are not humans also preprogrammed? Human programs are larger and more complex, of course, but still devoid of "thinking." Conversely, if humans really do think; that is, transcend preprogramming (free will, if you wish), then bacteria must also think. The third possibility is that at some step in the ladder of life, "higher" life forms begin to think. There is little evidence that life is split so profoundly between thinkers and non-thinkers. (Morowitz, Harold J.; "Do Bacteria Think?" Psychology Today, 15:10, February 1981.) Comment. This ancient controversy about determinism has been revived as: (1 ) Simple life forms have been found to be not-so-simple; (2 ) All life seems unified by a single (or small number of) genetic codes; and (3 ) " ...
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... mix. The once-independent and widely different cell nuclei will fuse, forming a single hybrid cell with a common membrane. Even more astonishing, this totally new biological entity will often divide and produce an endless line of the new hybrid. As might be expected, some hybrids do not remain true and revert to one or the other of the original species. Although cell fusion has been observed only under laboratory conditions, it seems to represent a near-universal cell phenomenon that might be realized rarely under natural conditions. The implications for the history of life are far-reaching. For example, the mitochondria in human cells that help our bodies use oxygen to obtain energy may well be descendants of bacteria that once fused with primitive cells. The same may be true for the chloroplasts in plant cells. (Thomas, Lewis; "Cell Fusion: Does It Represent a Universal Urge to 'Join Up'?" Science Digest, 86:52, December 1979.) Comment. Natural cell fusion might make large evolutionary steps possible and be much faster than endless small genetic changes. Are we all composite creatures? From Science Frontiers #10, Spring 1980 . 1980-2000 William R. Corliss ...
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... Project Sourcebook Subjects Remarkably Early Dates For Agriculture B.K . Maloney, of the British Museum, describes his pollen analysis of sediments that have accumulated in the Toba Highlands of North Sumatra, Indonesia. The base of a 9.7 -meter core from the Pea Sim-sim Swamp has yielded a radiocarbon date of 18,496 years. Pollen studies of the core indicate a brief decline of forest pollen about 17,800 BP along with increased sedimentation characteristic of cleared land. Taken by themselves, these data would probably be interpreted in terms of natural climate changes. But extremely early dates for human activity exist nearby: 14,000 BP for agriculture in Thailand and 11,000 BP for forest clearance on Taiwan. It is possible, therefore, that men were clearing land for planting in North Sumatra almost 18,000 years ago. (Maloney, B.K .; "Pollen Analytical Evidence for Early Forest Clearance in North Sumatra," Nature, 287:324, 1980.) Comment. Some archeologists hotly disoute the early dates mentioned above. For more, see our Handbook: Ancient Man. Ordering information for this volume may be found here . From Science Frontiers #13, Winter 1981 . 1981-2000 William R. Corliss ...
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... Science Frontiers ONLINE No. 1: September 1977 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Australian Mistletoes Mimic Their Hosts Many species of Australian mistletoes closely mimic their hosts in leaf form and general appearance, blending deceptively into the host's foliage. Plant mimicry for purposes of protection (for example, stone plants) and for propagation are well known and, in the logic of evolutionists, have evolved because of the advantages conferred on the species. Since the Australian mistletoes are evidently highly palatable to arboreal marsupials, the tenets of evolution hold that it is only natural that these mistletoes should develop so as to resemble their hosts for purposes of protection. This is called cryptic or camouflage mimicry. Australian mistletoes parasitize a wide variety of plants, and it is truly marvelous how they can detect and imitate the leaves and appearances of such a wide variety of hosts. (Barlow, Bryan, and Wiens, Deibert; "Host Parasite Resemblance in Australian Mistletoes," Evolution, 31:69, 1977.) From Science Frontiers #1 , September 1977 . 1977-2000 William R. Corliss ...
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... Science Frontiers ONLINE No. 84: Nov-Dec 1992 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects THE WOMAN WHO COULDN'T DESCRIBE ANIMALS The astounding complexity of the human brain was underscored recently by a 70-year-old woman, who could describe anything she saw except animals. The woman had an immune-system disorder that had damaged a small portion of her brain's temporal lobe. Her other mental faculties were intact. "The woman could name plants, foods, and inanimate objects and describe them without hesitation. The scientists were impressed that when shown a trellis, not exactly your everyday object, she could correctly name it and describe its cross-hatched geometry. "But when shown a squirrel or a dog, she froze. She couldn't find the right name for either, nor could she describe their size or shape or furry coats. "Her deficit, involving only a tiny portion of her language skills, was amazingly narrow." (Bor, Jonathan; "The Woman Who Couldn't Describe Animals," Baltimore Sun, p. A1, September 7, 1992.) The implications of this strange case were described in Science News: "The peculiar inability of a 70-yearold woman to name animals has led scientists to propose that the brain harbors separate knowledge systems, one visual, the other verbal or language-based, for different categories of living and inanimate things, such as animals and household objects." (Bower, B.; "Clues to ...
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... Science Frontiers ONLINE No. 141: May-Jun 2002 Other pages Home Page Science Frontiers Online All Issues Last Issue Next Issue Sourcebook Project Sourcebook Subjects Contents Archaeology An Ice-Age North Atlantic voyage? Somehow bananas slipped into West Africa 2,500 years ago Ancient messages on the Shroud of Turin Astronomy Europa's anomalous infrared spectrum Are the cosmic carriers of life comets or meteorites? Biology 'Modern' feathers on a non-avian dinosaur The intelligence of plants Unexplained weight-gain transient at the moment of death Geology Flank collapses: Generators of giant tsunamis Ragnarok: The Age of Fire and Gravel Geophysics Ball lightning gets some scientific respect Unknown species puts on spectacular light show Psychology Why music? Physics Falling in a quantized way Unclassified Where are those aliens? ...
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... Science Frontiers ONLINE No. 155: Sep - Oct 2004 Other pages Home Page Science Frontiers Online All Issues Last Issue Next Issue Sourcebook Project Sourcebook Subjects Contents Archaeology Plant diffusion in the pre-Columbian world Did Chinese Ships Anchor off California 1000 years before Columbus found San Salvador? An Olmec-Chinese Connection Astronomy Our Twin Planet? Evidence that Mars is a former Moon! Biology The Itjaritjari Tick-Tock: Telomeres count off the generations of a species' time on Earth Stealth fish Geology The Dwarfing of island megafauna and the remarkable survival of some A double-whammy for the Yucatan, but that's only part of the story Geophysics A sign? Star-of-David ice crystals fall upon West Sussex Hessdalen: Valley of enigmatic lights When coming events really cast their shadows before them! Physics Entangled moments Mathematics Patterns of very loosely knit prime numbers ...
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... Science Frontiers ONLINE No. 115: Jan-Feb 1998 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Acoustical Mirrors On Plants In Costa Rica, the plant Macuna holtoni , a vine-like member of the pea family, is pollinated by bats. To help echolocating bats to find its flowers in the dark, it has evolved a single petal on each blossom that is shaped like a concave ultrasound mirror. A bat searching for nectar- and pollen-bearing flowers with its ultrasonic cries can zero in on the strong echoes reflected from the plant. Both plant and bat benefit. (Anonymous; "Bat Mirror," New Scientist, p. 29, November 8, 1997.) Comment. What a neat, technically sophisticated adaptation. How did this plant "know" that the bats echolocated ultrasonically and what a good reflector would look like? Don't worry about trivia like this, evolution can explain everything! From Science Frontiers #115, JAN-FEB 1998 . 1998-2000 William R. Corliss ...
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... Science Frontiers ONLINE No. 116: Mar-Apr 1998 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Plant Life On Mars?" Strong evidence that plant life exists on Mars was advanced today by Earl C. Slipher, American astronomer, after observation of the planet, which is closer to the earth this month than at any time since 1924. .. .. . "His theory is founded on an apparent change in the planet's surface, regarded as his most important discovery. "The huge dark spot (Solis Lacus) or the Great Eye of Mars, seems to have assumed a shape not observed for fifty years, if ever before. Mr. Slipher indicated that this was strong evidence that plant life existed on the planet, and suggested that the change was due to fresh vegetation over an area roughly the size of the United States." (Anonymous; "Evidence of Plant Life on the Planet Mars Is Announced by an American Astronomer," New York Times, July 21, 1939. Cr. M. Piechota.) Comment. What a difference 59 years make! Could those tiny structures in ALH 84001 be fossilized pollen grains? From Science Frontiers #116, MAR-APR 1998 . 1998-2000 William R. Corliss ...
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... Science Frontiers ONLINE No. 116: Mar-Apr 1998 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Eyeless Vision Tomatoes see red. And other colors, too! We touched on this subject over a decade ago. (SF#54) Then we described how the use of red plastic mulch greatly improves the yields of tomato plants. More recent research reveals that fruit quality and resistance to pests are also improved. How can this be? Plant leaves, it turns out, contain color sensors -- light-sensitive pigments similar to those it the human retina. Obviously, the plants do not "see," but the pigments provide environmental information. Here's the mechanism: plant leaves reflect infrared light well, so when a tomato plant's pigments detect a lot of infrared, the plant "thinks" that it may be crowded out by competing vegetation. The tomato plant responds aggressively by growing more rapidly. The red plastic mulch between the rows also reflects a lot of infrared light, and it thereby tricks the tomato plant into accelerating its growth. (Raloff, Janet; "When Tomatoes See Red," Science News, 152:376, 1997.) Fire-detecting beetles. The beetle Melanophila acuminata seeks out forests that have just been ravaged by fires so that it can lay its eggs in the nutritious, freshly burnt wood. These insects are capable of detecting fires up to 32 kilometers (20 miles) distant. They do not see the fire with their eyes but instead detect the ...
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... Science Frontiers ONLINE No. 115: Jan-Feb 1998 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Nuclear Families Men who work at England's Sellafield nuclear power plant father significantly more sons than daughters. Male plant workers produced 109 boys for every 100 girls. This compared with 105 boys for every 100 girls for men in the same area who did not work at the plant. The bias was even greater for men who had received higher than normal doses of radiation in the 3 months prior to conception: 140 boys per 100 girls. Actually, both sets of figures are significant because of the large sample employed: 260,000 children. (Anonymous; "Does Atomic Plant Generate Sons?" Baltimore Sun, December 12, 1996.) Comment. The average sex ratio worldwide falls between 104-107 boys per 100 girls. There are, however, some fascinating geographical extremes: Montserrat 94.34 Aden 120.31 Why do these large differences prevail? Is Aden radioactive? For more on this subject, see our Catalog: Biological Anomalies: Humans II. From Science Frontiers #115, JAN-FEB 1998 . 1998-2000 William R. Corliss ...
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... landing field, they still may have a stellar connection of sorts. P.B . Pitluga, of Chicago's Adler Planetarium, proposes that some of the figures may be part of a Zodiac; that is, a terrestrial representation of the constellations. Here follows an abstract of her paper presented before a meeting of the Society for Scientific Exploration . "New field measurements and computer analysis link the gigantic ground drawings to the Andean tradition of dividing up space and time by cycles of the Milky Way. By including ethnoastronomy in the analysis, these conclusions differ from [those of] previous researchers. The first hypothesis tested was that the figures could be considered like labels to the lines. Of the twenty-seven figures, ten are birds, three are whales, and two are seaweed plants. Theodolite measurements revealed a non-random distribution of the directions of lines attached to look-alike figures. The second test showed a physical relationship of present-day Andean plant and animal figures imagined as silhouettes in dark spots along the Milky Way to figure-lines pointing to the rising and/or setting of the same Andean figure 2000 years ago. In the third test, all other lines extending to the desert horizon from a figure center keyed into dark spots and bright stars along the Milky Way at the same Local Sidereal Time in the same year. Finally, the directions of the long axis of each quadrangle related to the same sky in the same year at each site. Linking these findings with what is known about the Nazca culture, an agricultural-ceremonial model is ...
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... Science Frontiers ONLINE No. 111: May-Jun 1997 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Malleable Memories The ease with which psychologists can plant false memories in the minds of their subjects -- even savvy college students -- casts clouds over several anomalous phenomena, such as UFO abductions, ball lightning, and sea-monster sightings. Even scientists can be deluded into believing they have seen things in their laboratories. (Remember Blondlot's experiments with N-rays and the several physicists who confirmed his results?) Not that psychologists go around intentionally implanting memories of dubious phenomena. All it takes are suggestion, expectation, and/or paradigm-passion. At a 1997 meeting of the American Association for the Advancement of Science, several psychologists told of their "malleable-memory" experiments. H.L . Roediger III, Washington University, asked students: ". .. to look at a list of 15 words that included 'bed,' 'dream,' 'blanket,' 'doze,' and 'pillow.' Just over half said afterward that the word 'sleep' had been on the list, even though it wasn't ." E. Loftus, University of Washington, first asked a group of parents to describe some events that their children -- all now adults -- had experienced. Then, she went to the children and: ". .. walked them through a series of real incidents [mentioned by their parents] and then threw in a fake ...
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... Science Frontiers ONLINE No. 120: Nov-Dec 1998 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Gaia as a super-superorganism The Gaia hypothesis states that the earth's environment is maintained suitable for life by life itself. Our climate, atmospheric oxygen level, ocean composition, and similar vital conditions are kept livable by life's waste products, such as the oxygen emissions of plants. That something like Gaia is required is seen in the extreme disequilibrium of the earth's atmosphere compared to the near-equilibrium of the atmospheres of apparently lifeless Venus and Mars. For example, our atmosphere's 21% oxygen, a highly reactive gas, is many orders of magnitude higher than one would expect on a lifeless planet. Furthermore, life-friendly conditions have been maintained for billions of years despite large changes in the sun's output and the traumas of asteroid impacts. T.M . Lenton, writing in Nature, asks a salient question: How has planetary self-regulation (Gaia) been established and maintained by evolution and natural selection which operate on the level of individuals? In other words, evolution tells us that organisms should evolve so as to leave the most progeny not so as to regulate the atmosphere. Lenton answers that there must be feedback loops from the planetary environment that steer the evolution of individuals in the "proper" direction. Lenton goes on to explore some of these many feedback mechanisms; one obscure loop involves the production of dimethyl sulfide by marine phytoplankton. Truly, it ...
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... Science Frontiers ONLINE No. 116: Mar-Apr 1998 Other pages Home Page Science Frontiers Online All Issues Last Issue Next Issue Sourcebook Project Sourcebook Subjects Contents Archaeology Mystery of the stoned pharaoh Those ancient greek pramids An anasazi reservoir Astronomy Microscopic life on mars? Plant life on mars? "A FANTASTIC RESULT!" Ten strikes against the big bang Biology Eyeless vision The ultimate in unisex Eco-darwinism: diffuse individuals Monarch compasses Geology Miles of mush Global cooling has begun! Geophysics Target: greenland Ball lightning collides with car Earthquake weather High-fling catfish More on the mekong mystery Dr fogs and bright nights Physics G: THE EMBARRASSING CONSTANT OF NATURE Unclassified Evolution of cyberlife ...
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... !) only a "special case"T. Gold is again challenging our most cherished ideas about geology and life's domain. In the subject article -- his latest paradigm-shaker -- he first reviews the abundant evidence for the existence of large quantities of primordial hydrocarbons deep within the earth and (probably) many other planets throughout the universe. Associated with these hydrocarbons is a "deep, hot, biosphere." By "deep" Gold means 100 kilometers and more. It is this combination of a deep reservoir of hydrocarbons and life forms (probably mostly bacteria) that can account for (among other things): The fact that all helium comes from oil and gas wells The fact that the composition of petroleum is not what one would expect from the decomposition of plants and animals. It is really a mixture of primordial hydrocarbons with some added biochemical by-products; that is, products of that "deep" biosphere. Since carbonaceous material is now known to be common in the solar system (comets, carbonaceous chondrites, etc.), it is likely that many other planets also possess deep stores of hydrocarbons. In these deep, warm, protected, energyrich "wombs," complex biospheres might readily evolve. In Gold's view, deep biospheres may be the rule and surface life the exception! Finally, Gold sees life as merely a natural process with no more meaning and purpose than accelerating the breaking of chemical bonds and thereby increasing entropy! "It has been said that nature abhors a vacuum, but nature doesn't care ...
Terms matched: 1 - Score: 15 - 15 May 2017 - URL: /sf114/sf114p06.htm
... Science Frontiers ONLINE No. 115: Jan-Feb 1998 Other pages Home Page Science Frontiers Online All Issues Last Issue Next Issue Sourcebook Project Sourcebook Subjects Contents Archaeology Woodhenges before pyramids The berkeley walls extended Addenda and emenda Astronomy Why did life take a left turn? Biology Genes vs. memes A STRANGELY SELECTIVE SPIDER Acoustical mirrors on plants Stroke changes accent Nuclear families Geology The hilina slump a.k .a . "the big crack" Tektite mysteries Geophysics A SUBMARINE ORGAN? Frog fall A SKY-SPANNING AURORAL ARCH Psychology More sheldrake heresy Physics Splitting the electron's charge Unclassified Evolvable hardware ...
Terms matched: 1 - Score: 15 - 15 May 2017 - URL: /sf115/index.htm
