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... Science Frontiers ONLINE No. 43: Jan-Feb 1986 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects The Return Of The Tasmanian Tiger "In March 1982, a park ranger in northwestern Tasmania awoke in the dead of night. From force of habit, he scanned the woods, his spotlight punching through black walls of rain. And there in the beam was one of the strangest creatures he had ever seen. About the size and shape of a dog, it was covered with stripes that ran from its shoulders across its back to its thick, rigid, tail. "The animal stood still as the startled ranger counted the stripes, then it nonchalantly gave an enormous jaw-stretching yawn. But when the ranger reached for his camera, the creature faded into the undergrowth, leaving nothing but a rank smell. It also left a trail of excitement, for the bizarre beast looked exactly like a Tasmanian tiger -- also called a thylacine or Tasmanian wolf -- an animal thought to have been extinct nearly 50 years ago." Hundreds of people claim they have spotted the Tasmanian tiger since the last captive died in 1936, but we have no good photos or other "proofs." Mediaman Ted Turner has offered a prize of $100,000 for "verifiable evidence" that the Tasmanian tiger still lives. Consequently, the Tasmanian wilds are being combed diligently and automatic cameras, triggered by infrared beams, are being set up in likely spots. (Bunk, Steve; "Just How Extinct Is Tasmania's ...
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... Science Frontiers ONLINE No. 68: Mar-Apr 1990 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Two-faced indians trick tigers A significant hazard for fishermen and forest workers in western Bengal is a tiger attack. As these Indians go about their fishing, wood chopping, and honey gathering, tigers are wont to sneak up from behind, spring, and carry off a good-sized meal. But in recent experiments, some 900 volunteers have been wearing human masks on the backs of their heads. This strategem has cut ti-ger attacks drastically. The idea is that tigers, trailing a potential supper, see that human face and figure that the person is alert and watchful. In fact, tigers have been known to track maskwearers for hours without attacking. Pretty clever! How long before the tigers catch on? (Anonymous; "Protective Mimicry in Humans," BioScience, 39:750, 1989.) From Science Frontiers #68, MAR-APR 1990 . 1990-2000 William R. Corliss ...
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... Science Frontiers ONLINE No. 46: Jul-Aug 1986 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Tigers in western australia?The title of course refers to the Tasmanian tiger or wolf or thylacine. We reported above on the possibility of a small relict population of Tasmanian tigers in Tasmania, where the supposedly last specimen expired in a Hobart zoo in 1936. There is now good evidence that the thylacine also roams Western Australian, where it has been believed extinct for thousands of years! At hand are photographs, casts of footprints, a carcass that may be very recent, and many eye-witness reports. Much of the recent evidence has been gathered by Kevin Cameron, a first-rate bushman with two superbly trained dogs. A.M . Douglas, the author of this article and formerly Senior Experimental Officer at the Wetern Australian Museum in Perth was skeptical about living thylacines at first but is now a firm believer. He states, "I think Kevin Cameron has made the single most important wildlife discovery of this century." (Douglas, Athol M.; "Tigers in Western Australia?" New Scientist, p. 44, April 24, 1986.) From Science Frontiers #46, JUL-AUG 1986 . 1986-2000 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 Porpoise Stun Gun Just about everyone knows that some whales and porpoises have oil/wax-filled sound lenses in their foreheads. These biological lenses focus clicks and other sounds sonar-fashion ahead of the swimming animal, which then listens for echoes from prey and other targets. But what if these bursts of sound could be made very powerful -- could they be employed to stun and disorient prey? Bits of evidence are accumulating to support the theory that some whales and porpoises actually have acoustic stun guns in their foreheads. First, there are visual observations of fish being hunted by whales and porpoises suddenly giving up flight, becoming passive, and almost asking to be snapped up by their pursuers. Second, the stomachs of whales often contain much faster and more mobile prey -- often without any teeth marks. Finally, bottlenose dolphins are known to have the capability of producing bursts of sound five orders of magnitude more intense than their usual navigating clicks. This is more than enough to kill small fish. (Norris, Kenneth S., and Mohl, Bertel; "Can Odontocetes Debilitate Prey with Sound?" American Naturalist, 122:85, 1983.) Comment. Here is another instance of the "problem of perfection." An existing organ of great complexity seems utterly useless of only fractionally developed. One would think that the complicated sound lenses, the muscular sound-generating tissues, and their containing structures would ...
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... Science Frontiers ONLINE No. 69: May-Jun 1990 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Extinction Discounted "A computer analysis has left little doubt that the supposedly extinct Tasmanian tiger or wolf still exists in remote areas of Australia's island state." The thylacine (or Tasmanian wolf or tiger) has been reported repeatedly in recently years. The last captive specimen of the marsupial tiger or thylacine died in a Tasmanian zoo in 1936. No living specimen has been verified since, but sporadic reports persist in Tasmania, Victoria, and Western Australia. H. Nix, of the Australian National University's Centre for Resource and Environmental Studies, has a computer program based upon detailed descriptions of climatic, topographic, and environmental factors that identifies areas where a particular animal or plant could flourish. Nix gathered the environmen tal requirements of the thylacine from records of where they had been shot and trapped in the past. This plus the computer program allowed Nix to identify prime thylacine territory. Compar-ing this information with the best sightings over the past 60 years, Nix found perfect agreement. In other words, post-extinction reports of thylacines come from just those areas where one would expect them to! (Anonymous; "Computers Help to Hunt the Tasmanian Tiger," New Scientist, p. 24, March 10, 1990.) Comment. This all sounds a bit tauto logical; that is, like "circular reasoning"! Reference. The possible late survival of the thylacine is covered in BMD12 in our ...
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... Science Frontiers ONLINE No. 89: Sep-Oct 1993 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Why do electric fish swim backwards?This is not a trick question like the one about the chicken crossing the road. To understand the answer to the electric fish puzzle, we must restrict the discussion to those fish with active electric sensing systems. This group includes electric eels, South American knife fish, and African elephant snout fish. All of these have evolved, in a remarkable instance of parallel evolution, the capability of generating pulses of electricity. These pulses (up to 1,000 per second) radiate through the surrounding water. Prey and other nearby objects distort these oscillating electric fields. Electroreceptors on the fish and a sophisticated data processing system convert the field distortions into an "image" of the surroundings. M. and S.J . Lannoo, of Ball State University, have watched the black ghost knife fish, which plies murky Amazon waters, approach likely prey tail first. Swimming backward using an elongated belly fin, the knife fish slowly cruises past its potential victim. If the electrical image looks appetizing, the knife fish grabs its dinner with a forward lunge as it appears in front of it. "The researchers suggest that the fish swims past objects in order to scan them with its electroreceptors. This is the only way the fish can identify prey because an electric sense cannot be focussed like an eye. But if the fish carried out its scan by swimming forwards, the prey would end up ...
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... Color, Pattern and Size Curiosities BBA29 Egg Mimicry BBA30 Mimicry of Other Species and the Environment BBA31 Remarkable Convergences of Appearance and Habits BBA32 Frightmolt BBA33 The Hollow in the Back of the Young Common Cuckoo BBB AVIAN BEHAVIOR BBB1 Avian Intelligence BBB2 Complexity and Sophistication of Avian Mental Processes BBB3 Enigmas of Instinct BBB4 Anomalous Altruism: Hard to Find BBB5 The Aesthetic Sense in Birds BBB6 Calculated Deception: Birds That Cry "Wolf" BBB7 Avian Play BBB8 Anomalous Aerial Tumbling and Erratic Flight BBB9 Leks: Why Did They Evolve? BBB10 Cooperative Displays on Leks BBB11 Enigmatic Dancing, Flying, Singing BBB12 Anting BBB13 "Hangers"; Upside-Down Birds BBB14 Curious Automatisms BBB15 Handedness (" Footedness") in Birds BBB16 Unusual Aerial Transportation Techniques BBB17 Unusual Forms of Terrestrial Locomotion BBB18 Unusual Hunting Strategies BBB19 Cooperative Hunting BBB20 Prey-Handling Puzzles BBB21 Avian Prey and Food: Some Misconceptions BBB22 Unusual Sexual Behavior BBB23 Avian "Sperm Wars': Cloaca Pecking BBB24 Unusual Mating Systems BBB25 Two Species with a Common Nest BBB26 Determination of Clutch Size BBB27 Exotic Objects and Eggs in Nests BBB28 Unusual Methods of Heating and Cooling Eggs BBB29 Brood Parasitism: How Did It Begin BBB30 Disparities between Parasite Host Adaptations BBB31 Tolerance of Parasite Chicks BBB32 Tolerance of Parasite Eggs Even When They Are Recognized as a Threat BBB33 Murder for Purposes Other Than Food and Brood Reduction BBB34 Infanticide BBB35 Siblicide BBB36 Information Processing in Migratory Behavior BBB37 Uncommon Groupings of Birds BBB38 Flock Synchrony BBB39 Flight Formations BBB40 Avian "Courts" and "Funerals" BBB41 Avian Graveyards BBB42 Huddling and Stacking BBB43 Bird Battles BBB44 Miscellaneous Curiosities of Avian Behavior BBC CHEMICAL PHENOMENA BBC1 Palatable Eggs ...
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... Sourcebook Project Sourcebook Subjects Remarkable Animal Talents And Capabilities Looking backward with genital photoreceptors. Photoreceptors are sensitive to light but do not produce images. They are found in many groups of animals. Even humans possess photoreceptors besides their eyes; specifically, in the pineal gland and, perhaps, the knees. (SF#116, SF#117) The pineal gland (our "third eye") may have registered photons at some stage in our evolution, but it is now useless or adapted to other purposes. The arthropods, however, still find photoreceptors useful. Crayfish have them on their abdomens, where they initiate an escape response when illuminated. Additionally, the blind shrimp that collect around the glowing deep-sea vents have photoreceptors perched on their backs, presumably to guide them to their prey located around the luminous vents. Recently, the Japanese yellow swallowtail butterflies were discovered to sport photoreceptors on their genitalia. These I are used during mating to confirm the position of the female's ovipositor.(Arikawa, Kentaro; "Hindsight of Butterflies," BioScience, 51:219, 2001.) Barn-Owl auditory neurons multiple signals. Barn Owls can locate rustling mice in the dark with high precision. They discern their prey by sound rather than light. To achieve the high accuracy needed to home in on small rodents in the black of night, their ears are slightly offset so that they can draw a bead by using microsecond time-of-arrival differences in the sounds coming from the target. To increase the owl's passive sonar, their auditory neurons ...
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... 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 Another Sucker Female beaked whales are usually toothless, and the males only have a couple of teeth that are used for fighting rivals. Yet, these whales have no problem catching and consuming their swift, fishy prey. Apparently, they first stun their dinners acoustically and then suck them in with the pump-like action of their muscular tongues. (AR#2 and BMA25 in Mammals I) Occasionally, whalers have caught sperm whales with congenital, grossly twisted jaws that are completely useless in hunting, yet these animals thrive on a rich diet of fast, elusive squid. A. Werth of Hampden-Sydney College theorizes that these much larger cetaceans also suck in their prey just like the beaked whales. Sperm whales also generate sound pulses so strong that they can very likely stun the giant squid, their preferred food, as they pursue them with their sonar in miledeep blackness. (BMO10 in Mammals II) (Pennisi, Elizabeth; "Coming to Grips with Whale Anatomy," Science, 283:475, 1999.) Comment. Sperm whales and beaked whales are only distantly related, so that we have an interesting example of the triple parallel evolution of hunting strategy, acoustic-stunning capability, and large, piston-like tongues. Sperm whales may stun their prey with high intensity sound From Science Frontiers #122, MAR-APR 1999 . 1999-2000 William R. Corliss ...
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... Science Frontiers ONLINE No. 88: Jul-Aug 1993 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects The star of the star-nosed mole (Left) Tenticle-like rays surrounding one nostril of the star-like mole. (Right) The number of rays around the other nostril give the density of sensory receptors. The star-nosed mole is one of North America's more bizarre mammals. Its nostrils are surrounded by mobile, Medusa-like appendages that are richly suppled with nerves and blood vessels. These tentacle-like structures form the "star," which has long been considered a tactile organ used for feeling for prey. However, behavioral experiments by E. Gould et al indicate that the star may be more than a tactile organ. It seems to sport electrical sensors that detect the minute electrical fields surrounding worms, leeches, insect larvae, and other favorite mole tidbits. This conclusion derives from experiments in which starnosed moles preferentially attacked the parts of worms that are most strongly electrical. Actually, scientists have been puzzled as to how this mole found its prey, for this mammal is semiaquatic and somehow locates its dinner in muddy water even though it has poor eyesight. Although some fish possess electrical sensors, they are uncommon in mammals. Half way around the planet, another strange creature, also classified with the mammals, frequents muddy waters looking for the same sort of prey favored by the star-nosed mole. The Australian platypus also has weak vision and employs search techniques similar to those of ...
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... Science Frontiers ONLINE No. 58: Jul-Aug 1988 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Bacteria One dictionary's definition: "Widely distributed group of microscopic, one-celled vegetable organisms..." As a matter of fact, the nearly universal image of a bacterium is that of a simple, single-cell organism. But: "That view is now being challenged. Investigators are finding that in many ways an individual bacterium is more analogous to a component cell of a multicellular organism than it is to a free-living, autonomous organism. Bacteria form complex communities, hunt prey in groups and secrete chemical trails for the directed movement of thousands of individuals." J.A . Shapiro, author of the preceding quote, attributes the simplistic picture of bacteria to medical bacteriology, in which disease-causing bacteria are classically identified by isolating single cells, growing cultures from them, and then showing that they cause the disease in question. In the microscopic real world, bacteria virtually always live in colonies, which possess collective properties quite different and much more impressive than those of the single-cell-in-a -dish! That old human urge for reductionism has led us astray again. Shapiro seeks to remove the blinders of reductionism in a wonderful article in the June, 1988, issue of Scientific Amer can . We have room here to mention only the Myxobacteria, many of which never exist as single cells in nature. Even those that do are "social" in the sense that ...
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... Science Frontiers ONLINE No. 113: Sep-Oct 1997 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Acoustical Pipes In Beaked Whales?Because they are relatively rare, the comings and goings of beaked whales remain largely unrecorded. These mammals are effectively toothless for predatory purposes. In fact, some marine biologists speculate that they secure their slippery prey by suddenly vacuuming them up by actuating a pumplike tongue. (AR#2 ) But how do the beaked whales find their prey in the first place? With their sonar, of course. But these superbly streamlined animals lack the huge external ears of the sonar-using bats. How do they detect the weak echoes bouncing off fleeing fish? P. Zioupos and J. Currey, at the University of York, have drawn attention to the rostrum bone that forms the beaklike upper jaw of Blaineville's beaked whale. At 2.7 grams/cubic centimeter, this bone is 50% denser than the average mammalian bone. "The bone also turned out to have unique chemical properties. It contains 35 per cent calcium by weight -- 13 per cent more than the highest value known previously. Using microscopes, the team showed that the bone is riddled with tiny tunnels. containing highly concentrated minerals." The channelled nature of this bone make it very brittle, making it unlikely that it is used as a ram in mating bouts. Zioupos and Currey propose that this uniquely structured bone is really an acoustical pipe for the beaked whales' sonar signals. (Barnett, Adrian ...
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... Science Frontiers ONLINE No. 126: Nov-Dec 1999 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Swimming Up The Wrong Streams Of course, most freshwater fish do swim upstream in the usual way, but not the candiru. It is partial to very specific streams. This small, slim, scaleless species of catfish inhabits the Amazon where it preys on other fish, often by invading their gills and feasting on blood and tissue. They also aim much higher on evolution's ladder: they are the only known vertebrate parasites of humans. It is when they prey upon humans that they swim up the wrong streams -- at least their victims think so! Their technique is simple. They detect human urine released by swimmers and follow it right to the source. They don't stop there but insert themselves right into the penis and keep going, sometimes all the way to the bladder. Once inside the penis they erect their spines and cannot be extracted except by surgery. Left alone, they are not only excruciating to the unwise bather but can eventually be fatal. Surgeons have successfully extracted them from the bladder, but in remote areas penis amputation is the only answer! (Warren, Nicholas; "In Mare Internum," Fortean Times, p. 14, September 1999. Title translation: "Within the Inner Sea.") From Science Frontiers #126, NOV-DEC 1999 . 1999-2000 William R. Corliss ...
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... Science Frontiers ONLINE No. 40: Jul-Aug 1985 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Glitch in the evolution of funnelweb spider venom?The Australian funnelweb spider has a venom that appears to be effective only against humans, monkeys, baby rats, and fruit flies. None of these animals is normally on the spider's menu; those prey that are seem unaffected by the venom. Did the evolution of the poison miss its intended targets or did the spider's usual prey evolve resistance? It is interesting that mature rats are immune to the venom, although neonatal rats are not. (Anonymous; "Did You Know?" Ex Ni hilo, 7:16, no. 3, 1985.) Facts taken from The Australian Doctor, January 20, 1984.) From Science Frontiers #40, JUL-AUG 1985 . 1985-2000 William R. Corliss ...
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... other's sensory apparatus and "blind" each other. To circumvent this Eigenmannia has evolved a "jamming avoidance response," in which they both shift their pulse frequencies away from each other. To accomplish this, the fish must be able to detect time disparities between the two sets of signals less than 1 microsecond long. Their individual electroreceptors are not capable of handling such small time differences. Kawasaki has concluded that the jamming avoidance response can come only from highly sophisticated signal processing in the fish's central nervous system. (Kawasaki, Masashi; "Temporal Hyperacuity in the Gymnotiform Electric Fish Eigenmannia ," American Zoologist , 33:86, 1993.) Comment. Echo-locating bats and dolphins also possess sophisticated data processing apparatus for analyzing the echos they receive back from their prey and surroundings. It will be interesting to discover if evolution has come up with similar organic "components" for handling acoustic and electric signals. Further, we know that some insects have developed ears and sound generators to detect and jam hunting bats. Have the prey of electric fish evolved corresponding countermeasures? If not, why not? From Science Frontiers #89, SEP-OCT 1993 . 1993-2000 William R. Corliss ...
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... dark urine trail for the kestrel (above). The universe of voles -- small, mouse-like rodents -- is one of odor. They communicate with one another and navigate through their world of grass and vegetation by laying down trails of scent-laden urine. The world of kestrels -- eaters of voles -- is one of sight. Now, voles are hard to see in the grass far below a hunting kestrel, but evolution has come to the aid of the kestrels by giving them the capability to see in the ultra-violet portion of the spectrum. Can it be only coincidence that the urine trails of the voles happen to absorb ultra-violet light strongly? Kestrels can see these trails as dark streaks in the grass below and zero in on their prey. Finnish scientists, led by E. Korpimaki at the University of Turku, have demonstrated the above ultraviolet connection by somehow acquiring enough vole urine to lay out artificial trails in voleless areas. Sure enough, hunting kestrels were attracted to the experimental site and searched and searched the artificial vole highways -- volelessly. (Aldous, Peter; "Vole's Urine Is Their Downfall," New Scientist, p. 15, February 4, 1995. Gee, Henry; "In the Eye of the Kestrel," Nature, 373:387, 1995) Comment. Even as you read this, evolution is surely helping the voles by altering the ultraviolet signature of their urine! Sure, this is a bit facetious, but predator-prey relationships are always seesawing. We see ...
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... . Introverts get worse colds than extroverts. Men who have just lost their wives have lowered white-cell responses. Although many physicians and medical researchers think it too early to claim that mental stress significantly suppresses the human immunological system and thus leads to more illness, one can see the pendulum start to swing away from the timehonored belief that mind and body are entirely separate entities. The foregoing studies and others like them are discussed in a recent survey of psychoimmunology by B. Dixon. Toward the close of the article, Dixon asks why humans (and other animals, too) have evolved an immunological system sensitive to stress. Evolutionists can always find some sort of justification in Darwinian terms, and Dixon's is rather ingenious. Suppose a primitive human was attacked by a saber-toothed tiger (what else?). If the human survived, his immunological system would immediately go into high gear to clean up the wounds and repel invading germs. The trouble is that a revved-up immunological system (especially the white blood cells) can go too far and chomp up healthy tissue, too. However, evolution has constructed animals such that stress (saber-toothed tigers are stressful!) suppresses the immunological system to restrict the consumption of healthy tissues. While this short-term damper on immunological activity may have been useful to primitive humans, the stresses on modern man are less intense and long-term. We are sick a lot, particularly with cancer, because evolution has not yet adjusted or finetuned us to the new environment. (Dixon, Bernard; " ...
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... Online All Issues This Issue Sourcebook Project Sourcebook Subjects Predaceous insect larvae don " sheep's clothing"The larva of the green lacewing lives in colonies of the wooly alder aphid upon which it feeds. The aphids, however, are protected by "shepherd" ants which normally remove any undisguised predatory larva. To foil the ants, the larva plucks some of the waxy wool from nearby aphids and sticks it on its own back. Thus disguised, the larva continues to consume aphids without the ants being the wiser. (The aphids know of course.) Artificially denuded larva are immediately spotted by ants and ejected from the colony. Cases are known where animals protect themselves from predators by covering themselves with vegetable matter and other debris, but the lacewing larva is unusual in that it mimics its prey by stealing the prey's own clothing. (Eisner, Thomas, et al; "Wolf-in-Sheep'sClothing Strategy of a Predaceous Insect Larva," Science, 199:790, 1978.) Comment. Does evolution satisfactorily explain the existence of such a trait as this? From Science Frontiers #3 , April 1978 . 1978-2000 William R. Corliss ...
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... . 106: Jul-Aug 1996 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Facing Up To Divebombers When spring arrives Down Under, the black-backed magpies divebomb everything that moves in the vicinity of their nests. No one is spared: kids, cats, politicians, and even ornithologists are fair targets. But the solution is simple: "The National Parks and Wildlife Service reminds blitzkrieged Aussies that the birds are less likely to attack if they believe they are being watched. So the chic and the sensible don hats with sunglasses propped on top -- facing backwards, of course." (Anonymous; New Scientist, p. 84, February 24, 1996) Comment. The same solution has been adopted by Indians who work in tiger country. They wear human face masks on the backs of their heads. Tigers don't like to be watched either. From Science Frontiers #106, JUL-AUG 1996 . 1996-2000 William R. Corliss ...
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... , 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 have organs (photophores) that emit far-red light, and their eyes are correspondingly red-shifted by new visual pigments. Thus, these dragon fish can communicate with each other without being detected by other species ...
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... Science Frontiers ONLINE No. 80: Mar-Apr 1992 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Spider Swordplay Ventral view of D. raptor . The claws are on the tips of the bottom two pairs of legs. Greatly enlarged photos reveal them to be wicked-looking fang-like structures. D. raptor, a Hawaiian spider, has lost its ability to spin webs and therewith capture prey. This unusual spider, however, has evolved: ". .. one of the most remarkable morphological features ever found in spiders (immense elongations of the tarsal claws)." These claws, just visible on the two lowermost pairs of legs in the sketch, are employed to skewer passing insects in flight: "The spider is strictly nocturnal, spending most of the activity-period hanging upside down from silk threads. Small insects are snagged directly from the air using a single long claw. For larger insects the spider uses both long claws on legs I, or sometimes all the long claws." (Gillespie, Rosemary G.; "Impaled Prey," Nature, 355:212, 1992.) Comment. Nature has produced many remarkable creatures. They become anomalous only if they cannot be explained as the products of small, random, cumulative mutations. From Science Frontiers #80, MAR-APR 1992 . 1992-2000 William R. Corliss ...
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... Science Frontiers ONLINE No. 4: July 1978 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects The four-eyed fish sees all Anableps, the four-eyed fish, frequents the rivers and estuaries from southern Mexico to northern South America. Ac-tually, this curious fish has only two eyes, but each is divided in half horizontally; that is, each eye had two separate optical systems, each with its own focal length. The top half is for seeing in the air; the bottom half is for underwater. Thus equipped, Anableps can see prey and predators above and below the surface at the same time and increase its opportunities to get meals as well as escape from its enemies. (Zahl, Paul A.; National Geographic Magazine, 153:390, 1978.) Comment. Nature is full of such "marvelous" adaptations, but it is hard to see how fish bifocals could develop gradually, given the intolerance of optical systems to minute changes in dimensions, position, and refractive index. From Science Frontiers #4 , July 1978 . 1978-2000 William R. Corliss ...
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... Science Frontiers ONLINE No. 10: Spring 1980 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Why Birds Are Pretty Darwin believed that many male birds are brightly colored because females prefer flashy finery and thus put evolutionary pressure on the development of these characteristics. A large-scale study by Baker and Parker indicates that Darwin erred and that the evolutionary pressure comes instead from predators avoiding brightly colored targets. Instinct tells the predators -- incorrectly in many cases -- that colorful prey taste bad or are noxious. The remarkable (possibly strange) aspect of bird coloration is the incredi ble external similarity of unrelated birds occupying similar habitats. Example, the American Eastern Meadowlark (left) closely resembles the African Yellowthroated Longclaw (right). (Krebs, John R.; "Bird Colours," Nature, 282:14, 1979.) Comment. Two questions cannot be repressed: How do the genes orchestrate this amazing convergence in response to environmental factors? Why was evolution not equally clever in equipping predators with countermeasures to see through these ruses? From Science Frontiers #10, Spring 1980 . 1980-2000 William R. Corliss ...
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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 Parasites may reprogram host's cell The long, segmented filament shown in the illustration consists of the cells of a parasite that preys on the cells of red algae. Two such cells abut the parasitic filament. The small black circles are parasitic cell nuclei which, when confronted with a red alga cell, become wrapped in small "conjuctor cells" which are then somehow transferred to the host cell on the right. The actual transfer involves the formation on the host cell wall of a sort of dimple called a "secondary pit connection." (Why this forms is not known.) Once inside the host cell, the parasite nucleus and/or the cytoplasm transferred with it dramatically reprograms host cell operations. The host cell shifts into highgear food production, enlarging up to twenty times its normal size. The host cell wall thickens, its nuclei (large black circles) and chloroplasts multiply. Adjacent cells (left) remain unaffected. (Lewin, Roger; "New Regulatory Mechanism of Parasitism," Science, 226:427, 1984.) Comment. It is one thing for external stresses to stimulate cell reprogramming, but quite another when another species inserts its programs into those of the host. Is this another way of producing "hopeful monsters?" A parasitic filament growing between host cells, showing how parasite nuclei are first enclosed in bud-like conjunctor cells and then inserted into the host cell. From Science ...
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... Science Frontiers ONLINE No. 42: Nov-Dec 1985 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Fungus Manufactures Phony Blueberry Flowers Mummy-berry disease is a fungus that preys on blueberries. It propagates itself by turning blueberry leaves into whitish, bell-like structures resembling true blueberry flowers. Bees deceived by this ruse land on the fake blossoms, pause for a moment to sip a sugary fluid (fortuitously) exuding from lesions on the leaves, accidentally pick up some fungus spores, and then fly off to true blueberry blossoms. The transferred spores infect other blueberry plants, causing them to produce white mummy-berries rather than blueberries. When spring comes round, the fungus-filled mummy-berries release the fungus to the leaves, and the cycle continues. (Anonymous; "A Fungus That Courts with Phony Flowers," Science 85, 6:10, September 1985.) Comment. The explanations usually served up for such remarkable adaptations are: (1 ) It is the product of chance and natural selection; and (2 ) The Creator made things this way. Are there not other possibilities? Perhaps the fungus somehow stole the blueprints for the flower from the blueberry's genome; i.e ., genetic endowment. After all, viruses are always subverting cell machinery. From Science Frontiers #42, NOV-DEC 1985 . 1985-2000 William R. Corliss ...
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... Science Frontiers ONLINE No. 43: Jan-Feb 1986 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects "AND SO ON INFINITUM"Connoisseurs of facetious scientific poetry will recognize the above title as coming from a poem about vortices which have littler vortices preying upon them, etc. Well, it seems that matter may not have a basement of truly fundamental, indivisible particles either. If one does not count the rather primitive notion of Air, Fire, Earth, and Water, there are five basic levels of compositeness: (1 ) molecules; (2 ) atoms; (3 ) nuclei; (4 ) nucleons; and (5 ) quarks and leptons. But now physicists are beginning to see regularities in the lowest accepted layer, quarks and leptons, that betoken a sixth layer of compositeness or subdivisibility. In other words, quarks and leptons are not really fundamental and instead are composed of something else, which will undoubtedly eventually receive fanciful names. In this article, O.W . Greenberg delves into this sixth stratum and the "regularities" it engenders. The article is really too technical for Science Frontiers, but we thought our readers might like to be warned that our concepts of matter are based on infinite quicksand. (Greenberg, O.W .; "A New Level of Structure," Physics Today, 38:22, September 1985.) Comment. With ever-more-gigantic galactic superclusters being charted and the possibility of Big Bangs occurring "somewhere else," matter may also be infinitely ...
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... Science Frontiers ONLINE No. 45: May-Jun 1986 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Polar Bear Coats Are Thermal Diodes "A polar bear's hairs are completely transparent. The bear appears white because visible light reflects from the rough inner surface of each hollow hair. However, the hairs are designed to trap ultraviolet light. Like light within an optical fiber, the radiation is conducted along the hairs to the skin. This summertime energy supplement provides up to a quarter of the bear's needs. Thus, even while actively pursuing prey, the bear can still concentrate on building up its blubber layers in preparation for winter." In other words, the bear's fur lets heat in but not out -- in effect a thermal diode. (Anonymous; "Solar Bear Technology," Science News, 129:153, 1986.) Comment. How come polar bears are favored with this "marvelous adaptation" while the arctic foxes and other mammals shiver? From Science Frontiers #45, MAY-JUN 1986 . 1986-2000 William R. Corliss ...
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... Science Frontiers ONLINE No. 46: Jul-Aug 1986 Other pages Home Page Science Frontiers Online All Issues Last Issue Next Issue Sourcebook Project Sourcebook Subjects Contents Archaeology Tree-toting Extraordinaire Early Chinese Contacts with Australia? Astronomy Cosmic Currents Salt Structures on Venus? Halley's Comet Infected by Bacteria? Solar Neutrino Update Biology Spontaneous Human Combustion The Music of the Genes Are Fruit Bats Primates? Tigers in Western Australia? Geology Archaeopteryx and Forgery: Another Viewpoint More Paluxy Impressions Blackened, Broken Stones of the Middle East Which Came First? Geophysics The Moon and Avalanches Curious Luminous Display Over the Pacific Ocean Psychology When to Believe and When Not To Geomagnetic Stimulation of Poltergeist Activity ...
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... Science Frontiers ONLINE No. 52: Jul-Aug 1987 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Aggressive Mimicry Field studies have revealed that bolas spiders can mimic the odor of female moths, thus attracting for consumption the male moths. More specifically, the hunting adult female spider, Mastophora cornigera , releases volatile substances containing three moth sex pheromone compounds. (Stowe, Mark K., et al; "Chemical Mimicry: Bolas Spiders Emit Components of Moth Prey Species Sex Pheromones," Science, 236:964, 1987.) Comment. As in many other cases of mimicry, one wonders how the spider's capability developed by chance and in small steps. From Science Frontiers #52, JUL-AUG 1987 . 1987-2000 William R. Corliss ...
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... Science Frontiers ONLINE No. 68: Mar-Apr 1990 Other pages Home Page Science Frontiers Online All Issues Last Issue Next Issue Sourcebook Project Sourcebook Subjects Contents Archaeology Michigan's prehistoric garden beds Now it's greece! Astronomy Wanted: a bona fide black hole Quiet sun: violent earth Biology Ants like amps Two-faced indians trick tigers Recent survival of the elephant in the americas Game of life favors right-handers New life for martian life Magnetic bacteria in the soil and who knows where else? Periodical invasions of aliens Geology Impact delivery of early oceans Geophysics The english hums: radar or buried pipelines? Double image of cresent moon Crop circle craze continues Psychology Higher sight Dreams that do what they're told Physics Science waits for - almost begs for - refutation General Conformity strikes again ...
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... Science Frontiers ONLINE No. 93: May-Jun 1994 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Why Snakes Have Forked Tongues Laymen and scientists alike have wondered for millennia why some reptiles possess forked tongues. It seems that we may now have an answer: Some variations of the forked-tongue theme among lizards and snakes. "Theory, anatomy, neural circuitry, function, and behavior now support a hypothesis of the forked tongue as a chemosensory edge-detector used to follow pheromone trails of prey and conspecifics [especially the opposite sex]. The ability to sample simultaneously two points along a chemical gradient provides the basis for the instantaneous assessment of trail location." The framer of this hypothesis, K. Schwenk, adds that the forked tongue and, obviously, the muscles and neural circuitry to use it properly, have evolved independently at least twice, possibly four times. (Schwenk, Kurt; "Why Snakes Have Forked Tongues," Science, 263:1573, 1994.) Comments . One can compare the forked tongue to binocular vision. Both require the parallel evolution of impressive infrastructures of data processing "equipment." From Science Frontiers #93, MAY-JUN 1994 . 1994-2000 William R. Corliss ...
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... Sourcebook Project Sourcebook Subjects Why the hammer head?You probably thought, as we did, that the function of the hammerhead shark's weirdly shaped head was to separate the eyes and thus improve binocular vision. This is not the case. The visual fields of the hammerhead's eyes do not overlap at all. Each eye presents the brain with a separate, completely different image to integrate. What, then, could be the purpose of the hammer head? No one really knows, but three suggestions are as follows: The head acts as a hydrofoil and gives the heavier-than-water, swimbladderless shark better swimming control. Grooves on the hammer head channel water toward the nostrils, providing "stereoscopic sniffing." The head is a platform for electromagnetic sensors that help locate prey. Stingrays are a favorite food of the hammerhead, and the shark may de-tect them electromagnetically, as surmised by the author of this article in the following encounters: "I have observed great hammerheads swimming close to the bottom, swinging their heads in wide arcs (a motion common, in a lesser degree, to all large sharks) as if using the increased electroreceptive area of their hammer like the sensor plate of a metal detector. Sometimes, these animals would doubleback to scoop up one of several stingrays hiding in the bottom silt. The minute electrical pulse that keeps the stingray's heart and spiracles operating betrays their presence to a hungry hammerhead." (Martin, Richard; "Why the Hammer Head?" Sea Frontiers , 35:142, 1989.) ...
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... upon an adult male. When I first saw him he was sitting quietly beside a creek, but he soon wandered into a damp thicket of alder, spicebush, and false hellebore. Before disappearing from sight, however, he began to rock back and forth. I followed, trying to stay just close enough to see what he was up to without disturbing him. Fortunately, he did not scare easily, which allowed me to approach within a few yards as he meandered, walking and rocking. First, I noticed that the rocking was caused by short bouts of stomping with the front feet, alternating between left and right. Then he suddenly jabbed his head at the ground and ate something. This behavior continued for a half hour, and several times I caught a glimpse of the prey - earthworms snatched from the surface. I suddenly realized the turtle was 'grunting' for worms!" Turtle preparing to stomp; i.e . 'grunt'. Earthworms, for reasons we cannot fathom, pop out of the ground and flee in panic when vibrations flood their milieu. The wood turtle has apparently learned how to take advantage of this weakness of worms. So have some gulls and plovers. In fact, some humans make their living grunting for earthworms. They simply drive a stake into the ground and draw a notched stick across it to make the worms surface. In Apalachicola National Forest, in Florida, about 700 permits ($ 30 each) are issued each year to earthworm grunters! Back to wood turtles, how do they acquire this skill? Even ...
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... seem to be recognized by science. His list is based upon his collection of 20,000 references. Obviously we cannot reproduce all his descriptions here, but we will pass along three of the most interesting. A dolphin with two dorsal fins, both curved backwards, the anterior one set on the forehead like a horn. The first observation was apparently by Mongitore in the Mediterranean. During the Uranie and Physicienne expedition, Quoy and Gaimard reported a whole school of them between the Sandwich Islands and New South Wales. They were spotted black and white. Hairy "wild men," known as satyrs in classical antiquity. These were probably Neanderthals that survived into historical times. The most recent sightings were in 1774, in the Pyrenees, and 1784, in the Carpathians. Giant birds of prey in North America -- the famous "thunderbirds." Observers put the wingspans between 10 and 16 feet, making thunderbirds much larger than the Andean condor. Reports have come in from all over the southern United States. Some remains of these carnivorous birds have been dated at 8,000 years. (Heuvelmans, Bernard; "Annotated Checklist of Apparently Unknown Animals with Which Cryptozoology Is Concerned," Cryptozoology, 5:1 , 1986.) Comment. Although Heuvelmans has a file of 20,000 references, formal scientific recognition usually requires specimens, or something better than testimony. Reference. The subject of cryptozoology is covered in BHU and BMU in our catalogs: Biological Anomalies: Humans III and Biological Anomalies: Mammals II, respectively. For ordering information, visit: here . ...
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... Science 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 Gulper Eel And Its Knotty Problem Occasionally brought up from great depths in nets, the gulper eel consists mainly of a huge mouth followed by a large bag of skin and, finally, a very long thin tail. The eel, often 6 feet long, can swallow prey as large or larger than itself. Such features are not particularly rare in deep-sea-creatures, but we do have to briefly describe this grotesque fish to get a delightful anomaly. It seems that in a few recovered specimens, the thin tail is tied in several overhand knots! Now moray eels can knot themselves, but the gulper eel is just a floating stomach with negligible musculature in its whiplike tail. So, just how did the knots get there? (de Sylva, Donald P.; "The Gulper Eel and Its Knotty Problem," Sea Frontiers, 32:104, March-April 1986.) Comment. We cannot resist mentioning the occasional discovery of groups of rats all tied together by their tails. Called "rat kings," these hapless snarls of rodents are usually dismissed as pranks or outright prevarication. How-ever, in recent years, respected naturalists have found "squirrel kings" in the wild. Gulper eels are not the only animals with knotty problems. From Science Frontiers #45, MAY-JUN 1986 . 1986-2000 William R. Corliss ...
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... Issues This Issue Sourcebook Project Sourcebook Subjects The Eels Strike Back Credit cards and bank cards are commonly kept in holders made from eelskin. So what! Who likes eels anyway? Well, there may be more to eelskin than meets the eye. Thousands of bank cards, when taken out of their eelskin holders, have failed to work in bank machines. The electronic coding on the cards has somehow been erased or scrambled. Perhaps, says one theory, the eelskins have bits of magnetite in their skins for navigational purposes. (Some other animals have such magnetic particles in their bodies to help orient them.) But could these tiny particles be powerful enough to erase card information? Another theory is that magnetic clamps on purses and handbags are the culprits. (Anonymous; "Credit Cards Fall Prey to Primitive Fish," New Scientist, p. 30, March 3, 1988.) Banking-business bane. From Science Frontiers #57, MAY-JUN 1988 . 1988-2000 William R. Corliss ...
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... will fill an im portant gap in (the) knowledge of the evolution of whales." Actually, the opposite seems to be the case. "One of the interesting things about the discovery is that it appears 'this guy didn't follow the same evolutionary path as living whales,' McLeod says. Sperm whales today have well-developed teeth only in the lower jaw, whereas the fossil whale shows evidence of very large, very welldeveloped teeth in both upper and lower jaws." (Tyndall, Katie; "A Whale's Legacy," Insight, 49, June 15, 1987. Cr. C. Stiles.) Comment. One would think that a full mouth of teeth would serve sperm whales better, especially in their battles with the giant squid they prey upon. Is evolution reversing for whales? From Science Frontiers #55, JAN-FEB 1988 . 1988-2000 William R. Corliss ...
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... shaped terminating in a cul de sac studded with large rock piles. (See illustration.) Most of the wall arms are 300-3 ,000 meters long. They are constructed of basalt rocks from ancient lava flows. Artifacts found nearby suggest ages of at least 7,000 years. Younger, but very similar, structures have been found in Central Asia. A. Betts of the University of Sydney has been exploring these walls and attempting to discern their purpose. The best explanation seems to be that the ancient inhabitants of the region drove herds of wild animals into the wide mouths of the kites and then slaughtered them when they were trapped at the corral-like ends. The worst explanation is that extraterrestrials built them for some unknown purpose! (Anderson, Ian; "Prehistoric Prey Met Death through a Keyhole," New Scientist, p. 15, September 24, 1994.) Comment. Some kite walls extend 30 kilometers (18 miles) and represent a considerable investment of labor. See also: Field, Henry; "Early Man in North Arabia," Natural History, 29:32, 1929. Of course, aliens could have herded ancient humans into the kites. Remember the classic sci-fi story: "To Serve Man"? From Science Frontiers #96, NOV-DEC 1994 . 1994-2000 William R. Corliss ...
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... 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 much for free energy either. All of biology is just a device for degrading energy from chemical sources, and on the surface from the great temperature differential between the hot sun and the cold of space. Perhaps biology is just a branch of thermodynamics, and there is no sudden beginning of life, but a gradual systematic development toward more efficient ways of degrading energy. .. .The chemical energy available inside a planetary body is then more likely to have been the first energy source and surface creatures -- like elephants and tigers and people -- which feed indirectly upon solar energy are just a specific adaptation of that life to the strangely favorable circumstances on the surface of our planet." (Gold, Thomas; "An Unexplored Habitat for Life in the Universe," American Scientist, 85:408, 1997.) Undiscovered microbial life may exist kilometers beneath the surfce. These microbes may be the source of the biological molecules found in the oil shown seeping upwards. Gold believes this oil was originally abiotic. From Science Frontiers #114, NOV-DEC 1997 . 1997-2000 William R. Corliss ...
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... the remarkable fact that it consists of 45 active compounds. One of these is specific to insect brain cells; another, to human nerve cells. (da Silva, Wilson; "Spider Gives Kiss of Death to Pests," New Scientist, p. 23, May 17, 1997.) Comment. Since humans are not on the funnel web's menu, it must be only a coincidence that its venom kills people so selectively. It would be nice to know if chimps, gorillas, and orangs really are immune. A related phenomenon is seen in the venoms of cone shells. These snails are much more dangerous to humans, particularly naive shell collectors. Their venoms are extraordinarily complex and contain hundreds, perhaps thousands, of toxins. Many of these are specific to potential prey. Once again, humans are not on the menu but are included anyway. (Concar, David; "Doctor Snail," New Scientist, p. 26, October 19, 1996.) Comment. Both cone shells and the funnel web spider seem to possess venom factories capable of concocting wide ranges of toxins, even though some are of no practical use. Whence this amazing versatility in sophisticated chemical synthesis; how did these extraordinary glandular factories evolve? From Science Frontiers #115, JAN-FEB 1998 . 1998-2000 William R. Corliss ...
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... Science Frontiers ONLINE No. 43: Jan-Feb 1986 Other pages Home Page Science Frontiers Online All Issues Last Issue Next Issue Sourcebook Project Sourcebook Subjects Contents Archaeology The Mysterious Tumuli of New Caledonia How Old is the Los Lunas Inscription? A Japanese Presence in Ancient Mexico? Astronomy Waiting for Saturn's Rings to Collapse Anomalous Distribution of Large, Fresh Lunar Craters The Planets As Fragments of An Ancient Companion of the Sun A Recent Transformation of Sirius? Biology & Geology The Return of the Tasmanian Tiger Life Seeks Out Energy Sources Wherever They May Be The Biological Diversity Crisis Treasures in A Toxonomic Wastebasket Piscatorial Data Processing Exploring the Suberranean World of Life The Cretaceous Incineration Everglades Astrobleme? Geophysics Underground Weather 1500-pound Ice Chunk Falls From Sky Psychology The Voice of God Chemistry & Physics "And So on Infinitum" The Thorny Way of Truth: Part II ...
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... -like weapon in battling invaders of its territory. The flat sides and silvery scales of this species make highly efficient mirrors. These fish have learned how to maneuver their bodies so as to reflect bright flashes of sunlight directly into the eyes of their opponents. These intense bursts of light are often enough to burst blood vessels in the eyes of the target fish -- sometimes even stunning it. Pairs of Amazonian angel fish have been observed flitting about in "light-fights" as they attempt to zap each other and avoid optical counterattacks. (Anonymous; Creation/Ex Nihilo , 21:7 , March-May 1999. Attributed to Sydney Morning Herald , October 13, 1998.) Comments. The use of light as an offensive weapon is reminiscent of those dolphins that stun their prey with powerful pulses of sound. Creation/Ex Nihilo is an Australian Creationist publication. It is easy to see why creationists focus on these lightfighting fish. Their weapons required the coevolution of flat sides, silvery scales, and the complex instinctive behavior needed for orienting their bodies relative to both the sun and their opponents. From Science Frontiers #123, MAY-JUN 1999 . 1999-2000 William R. Corliss ...
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... Science Frontiers ONLINE No. 130: JUL-AUG 2000 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Attention, Pupils!The following questions appeared in the December 11, 1999, issue of the New Scientist: Why do some animals have a non-circular pupil? Cats and some snakes have a vertical shape yet horses and goats have a horizontal one. What is the reason behind the differences and, more importantly, how do the different shapes affect how animals actually see things? The answer for the vertical slit is that it improves an animal's focus in the direction perpendicular to the slit. Thus, cats and snakes hunting close to the ground can better detect their prey over a wide horizontal field. But how about the horses, goats and other grazing animals that must keep their eyes open for predators across a wide horizon? Pupils with horizontal slits would seem to defeat this purpose. Ah, but when they lower their heads to graze, their vertical pupils become horizontal. Simple! (Anonymous; "Eye to Eye," New Scientist, p. 85, December 11, 1999.) Comments. But puzzles remain, otherwise we wouldn't address this subject. (1 ) Some snakes have round pupils (as in the illustration) having apparently been subjected to different environmental forces; (2 ) Of all the 9,000+ species of birds, only the skimmers own pupils with vertical slits. You would expect ground-feeding birds like robins and larks to also have them; ( ...
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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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... large praying mantis sitting on top of it. As the hummingbirds approached, it appeared as if the praying mantis was actually stalking them. This continued all day, but the hummingbirds safely eluded the clutches of the praying mantis. When the praying mantis was still on top of the hummingbird feeder the next day, Mrs. Weirda decided to capture the unusual activity on film. She quickly set up her camera and waited. As fate would have it. the praying mantis' persistence paid off. The unexpected did happen, and Mrs. Weirda captured the humming-bird's struggle on film. The amazing thing about this strange event is that the praying mantis consumed the entire hummingbird. Only a few feathers were left as witness to the struggle." (Anonymous; "' Insect Tiger' Strikes Hummingbird," Wild Bird News, no. 5, September/October 1994.) From Science Frontiers #97, JAN-FEB 1995 . 1995-2000 William R. Corliss ...
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... , vipers were philosophically minded. They might look at their marvelously complex fangs with the canals inside, a nearby poison gland, a poison storage reservoir with special ducts leading to the fangs, a fang-erection mechanism, a set of muscles to squeeze the poison reservoir, and a nervous system to control the whole system, and conclude that there must be an Ophidian Principle at work in the universe for vipers to end up with all these neatly interconnected biological components! Using the foregoing musings for a launch pad, Moliner assails Darwinism head on, employing the "what-good-is half-a -wing" and "complexity" arguments: "It is easy to visualise how random mutations followed by natural selection could lead to the right curvature of the fangs for better grasping of prey. But what would have been the selective advantage of the rest of the poison system if just one of its components had failed to evolve? To claim that it can be achieved through unbiased evolution is like expecting that nine independent miners can attack the core of Mount Everest from various points at the foot of the Himalayas and meet exactly in the middle without the guidance of a surveyor." (Moliner, E. Ramon; "' I Hiss Therefore I Am'," New Scientist, p. 48, November 11, 1995) Comments. We will enjoy reading the inevitable letters to New Scientist from evolutionists. Probably, too, creationists will now be quoting Moliner. Even so, we see much discussion of "adaptive" or "directed" evolution in the scientific literature ...
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... 1986 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Platypus Bill An Electrical Probe The bill of the duck-billed platypus has always looked kind of dumb -- as if Nature flushed with her success with polar bears (below) got careless when designing the platypus! How ignorant we were of Nature's genius. The platypus didn't borrow its snout from ducks but rather from the electric fishes. "That evolutionary enigma, the duckbilled platypus, has more than its egglaying to distinguish it from other mammals. It now appears that in common with some species of fish and amphibians, it can detect weak electric fields (of a few hundred microvolts or less). Not only that, but it uses its electric sense to locate its prey, picking up the tiny electrical signals passing between nerves and muscles in the tail of a shrimp." (Anonymous; "The Battery-Operated Duck-Billed Platypus," New Scientist, p. 25, February 13, 1986.) Reference. Mammal electrosensitivity is cataloged under BMO8 in Biological Anomalies: Mammals II. This catalog is described here . From Science Frontiers #45, MAY-JUN 1986 . 1986-2000 William R. Corliss ...
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... the radar screen of a fighter closing in on an enemy aircraft? Or perhaps the electrical signals generated by the fish mentioned in SF#43? Of course the answer is: None of the above. We have a different story to tell. These blips, representing queries and responses, are not generated by human-built radars or by electrical fish, but rather by animals much 'lower' on the evolutionary ladder -- fireflies. This illustration is Fig. 3 in a lengthy review article and carries the following unilluminating caption: "Examples of Entrainment of femme C's (see Table 3) Responses to Multiple Counterfeit Flashes." It seems that we have some sort of electronic warfare between the femme (predatory female fireflies that lure other fireflies with false signals) and the preyed-upon species. The many pages describe all sorts of feints, verification signals, and other stratagems. (Carlson, Albert D., and Copeland, Jonathan; "Communication in Insects," Quarterly Review of Biology, 60:415, 1985.) Comment. It is impossible to do justice to this paper in this short review, but two things should be mentioned: (1 ) Fireflies may be considered "low" on the evolutionary ladder, but their tiny brains certainly process a lot of data in complex ways; and (2 ) In southeast Asia, massed fireflies flash in synchronism along some riverbanks, creating one of the great spectacles of nature. See our Handbook Incredible Life for details. For a description of this book, visit: here . From Science ...
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... a notched stick across the trunk of a small tree to generate vibrations. Wood turtles are said to "stomp" for worms. (SF#65) Kiwis and Kagus also stomp for their dinner. (Kagus are rather strange birds found in New Caledonia.) We have just learned that Woodcocks will beat their wings against the ground to coax earthworms within range. (Hennigan, Tom; "A Wonderfully Bizarre Bird," Creation/Ex Nihilo , 19:54, September-November 1997.) Comment. Woodcocks seem to lure worms to the surface in still another way: They "bob" or "rock" their body in a most peculiar manner. It is thought that the resulting pressure waves are transmitted to the ground through their feet and that these bring their favorite prey to where they can be grasped. (Marshall, William H.; "Does the Woodcock Bob or Rock -- and Why?" The Auk , 99:791, 1982.) The American Woodcock -- a very strange bird, said to fly off with its chicks clasped between its thighs! From Science Frontiers #114, NOV-DEC 1997 . 1997-2000 William R. Corliss ...
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... Science Frontiers ONLINE No. 82: Jul-Aug 1992 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Can you guess where this quotation comes from?THE GRADUALIST'S DILEMMA "The basic article of faith of a gradualist approach is that major morphological innovations can be produced without some sort of saltation. But the dilemma of the New Synthesis is that no one has satisfactorily demonstrated a at the population genetic level by which innumerable very small phenotypic changes could accumulate rapidly to produce large changes: a process for the origin of the magnificently improbable from the ineffably trivial. This leads to skepticism about the microevolutionary approach. Perhaps, as Waddington put it: 'the real guts of evolution -- which is, how do you come to have horses and tigers, and things -- is outside the mathematical theory.'" Did you guess a creationist publication? Sorry! (Thomson, Keith Stewart; "Macroevolution: The Morphological Problem," American Zoologist, 32:106, 1992.) (And just the other day, we read that evolution was a proven fact!) From Science Frontiers #82, JUL-AUG 1992 . 1992-2000 William R. Corliss ...
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