25 results found.
... Science Frontiers ONLINE No. 99: May-Jun 1995 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects 90-DAY SEA-LEVEL OSCILLATION AT WAKE ISLAND Most North Americans are familiar with rather powerful diurnal tides. The oceans, however, also move in ponderous cycles that beachcombers can never appreciate. Thanks to data from Geosat's precision altimeter, geophysicists can now discern some of these long-period moving patterns on the oceans' surfaces. "Energetic 90-day oscillations of sea levels have been intermittently observed at Wake Island in the western tropical Pacific during the past 2 decades. The oscillations tend to occur about 1.5 years after El NinoSouthern Oscillation events, to have amplitudes of 10-15 cm, and to persist for about 1 year. Sea-surface heights from the Geosat altimeter are used to establish that these signals take the form of Rossby waves and have an energy source near the Big Island of Hawaii, which lies 40 of longitude to the east. Sea-level and upper-layer currents from an eddy-resolving numerical model are examined and suggest that the energy source is eddies generated off the Big Island of Hawaii. These eddies appear to be associated with westward currents that intermittently impinge on the island." (Mitchum, Gary T.; "The Source of 90-Day Oscillations at Wake Island," Journal of Geophysical Research, 100:2459, 1995.) Comment. Such eddies would have to persist for long periods to survive the long trip to Wake Island some 2500 miles ...
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... 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 Seashore Seiches At many spots around the world, sealevel rises and falls with periods of only a few minutes -- much shorter than the common semidiurnal tides and much longer than wind-generated waves. These oscillations of the water surface are termed "seiches." Two fundamentally different kinds of seiches have been noted in the recent literature. The first variety is transitory and can be set into motion by weather disturbances and earthquakes. The second is permanent and a bit more mysterious. Let's take transitory seiches first September 17, 1992. Anglesey, England. At about 0700 in the morning: "I was on the beach at Trearddur on western Anglesey, when an acquaintance drove down the beach towing a fishing boat. He launched the boat in about six inches of water and we then engaged in conversation for a couple of minutes. Turning to the boat, we were amazed to find that it was high and dry about 20 metres from the water's edge. Small flatfish, mainly immature brill, could be seen stranded and flapping in the wet sand. About a minute later, the sea started to return and quickly rose up the beach beyond where the boat had originally been launched. An hour later, the oscillation in sea level was still taking place. I determined that the period was just over three minutes and the amplitude just under one metre, the latter measured with reference to a half-submerged ...
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... prolate, as illustrated. The amplitudes of these deformations are small, just a centimeter or so after big quakes. The tone or frequency of the quivers is just a few millihertz, which translates to periods ranging from 3-54 minutes. We doubt that the telestomping elephants mentioned under BIOLOGY can detect these quiverings. That the earth does indeed "ring" is old news. Geophysicist A.E .H . Love mentioned the possibility in 1911. It is also recognized that large earthquakes can set the earth to ringing (" quivering" is better). What is news is the discovery by N. Suda et al that our planet rings even when no major quakes are occurring, and no one yet knows why. Suda et al write: "The observed "background" free oscillations represent some unknown dynamic process of Earth." Suda and his colleagues detected these oscillations using a superconducting gravimeter, which they installed in a seismically-quiet place: Antarctica. The favorite explanation for the background oscillations is turbulence in the earth's atmosphere. Ocean tides and currents are also on the list as potential "bell-ringers." [El Ninos were not mentioned!] (Suda, Naoki, et al; "Earth's Background Free Oscillations," Science, 279: 2089, 1998. Also: Kanamori, Hiroo; "Shaking without Quaking," Science, 279:2063, 1998.) From Science Frontiers #118, JUL-AUG 1998 . 1998-2000 William R. Corliss ...
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... Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Death waves and seebars A comprehensive, 12-page article on seiches appeared in the July/August issue of American Scientist, and it was awash with curious observations. A seiche (pronounced "saysh") is a rhythmic rocking motion of a body of water that has been disturbed by natural forces, such as sudden weather changes and, especially, earthquakes. A famous example of the latter seichedriving force occurred on March 27, 1964, when the Great Alaskan Earthquake sent seismic waves rippling around the globe. Fourteen minutes after this quake, the tremors reached the U.S . Gulf coast and triggered numerous seiches in bays, harbors, canals, bayous, etc. Some crest-to-trough waterlevel oscillations reached 2 meters in amplitude. Startling though these seiches were to Gulf fishermen, most seiches are wellexplained. Bodies of water that are mostly enclosed have natural frequencies of oscillation or "sloshing," just as do coffee cups and bathtubs. The Alaskan quake just operated on a larger scale than a bump to your coffee cup! Short-period oscillations in the tidal record from Puerto Princesa, Palawan Island, Philippines. These are coastal seiches, but hardly "death waves"! So far, so good. But there are exists an interesting -- and sometimes dangerous -- class of related events that affects open coastal waters. The Irish call them "death waves." In the Baltic, they are "seebars;" in the Azores, "lavadiads." Whatever their ...
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... Science Frontiers ONLINE No. 31: Jan-Feb 1984 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects The Sun As A Scientific Instrument In connection with the preceding item on solar oscillations and asymmetry, a few brave astrophysicists are now proposing that one mode of solar oscillation (the 160-minute period) is really a manifestation of the sun "ringing" in response to gravity waves sweeping through it! A nearby binary star, Geminga, has a period of this length. It seems that the 160-minute oscillation of the sun is far too long to be a solar pressure wave, and external forces could conceivably be involved. This article also mentions "the throbbing earth" reported in SF#30, an effect which may result from gravitational waves emanating from the center of our galaxy. (Walgate, Robert; "Gravitational Waves on the Sun?" Nature, 305:665, 1983.) From Science Frontiers #31, JAN-FEB 1984 . 1984-2000 William R. Corliss ...
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... No. 121: Jan-Feb 1999 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Lake Champlain's Two Seiches The main body of Lake Champlain is 117 kilometers long, with an average breadth of 6.3 kilometers, and average depth of 29 meters. Although its shoreline in complex, there is a deep channel about 2 kilometers wide with steep sides running lengthwise along the lake floor. When wind blows across the lake's surface, wind-drag pushes surface water downwind. When the wind stops or changes direction, the piled-up water is freed, and standing waves are set up as the water sloshes back and forth in the lake basin. These waves are called "seiches." Lakes usually have characteristic periods of oscillation. For Lake Champlain, it is 4 hours, with amplitudes measured only in centimeters on the surface of the water. What makes Lake Champlain of more than usual interest is the presence of a second seiche, an internal phenomenon not visible on the surface. In the summer, Lake Champlain is stratified with a thermocline separating a layer of warm surface water from much colder deep water. You can only "see" the thermocline if you lower a thermometer into the water. This thermocline also exhibits seiches, but they are startlingly different from those on the surface. In Lake Champlain, the period of the internal seiche is 4 days rather than 4 hours. The amplitudes fall between 20 and 40 meters instead of being in the centimeter range. Just a few meters below the lake' ...
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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 Schizophrenic Neutrinos "As the concept of the neutrino has developed since the early 1930s, it has developed a split personality and put on weight. The neutrino is now thought to come in three varieties -- electron neutrino, muon neutrino and tau neutrino. And a number of experiments are showing hints that a neutrino has a small mass and that it can oscillate from one variety to another." These experiments are not yet conclusive; and if the neutrino mass is not zero, it hardly weighs more than the grin of a Cheshire cat. But taken together, the laboratory results confirm that neutrinos are perplexing particles. Are they different entities or a single species wearing different costumes? The implications of the recent measurements are far-reaching: Physicists believe that there are a billion neutrinos around for each nucleon (proton, neutron, etc.) so that if neutrinos possess just a hint of mass, they will dominate the mass of the universe; and Measurements of solar neutrinos fall short by a factor of three of what theory says the sun should spew out. This discrepancy could be explained if the solar neutrinos change from electron neutrinos to another form during their flight from the sun to earth, for the terrestrial neutrino detectors measure only electron neutrinos. (Anonymous; "Do Neutrinos Oscillate from One Variety to Another?" Physics Today, 33:17, July 1980.) From Science Frontiers #12, Fall 1980 . 1980- ...
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... 43 10.024 0.004 10:00 10.019 0.004 10:12 10.020 0.004 10:24 10.024 0.004 10:58 10.028 0.004 Effects of a solar eclipse upon a paraconical pendulum. (After M.F .C . Allais). If the above effect of the eclipse on the pendulum period is not strange enough, consider what happened at 10:08, in the chart, above right. "At that moment a surprising fact occurred, the pendulum produced a perturbation by describing an ellipse whose major axis deviated in relation to the initial plane by approximately 15 . The eccentricity of the ellipse was 0.18. At the end of the eclipse the pendulum continued to maintain the elliptical oscillation, but the major axis approached increasingly to its initial plane." (Jeverdan, G.T ., et al; "Experiments Using the Foucault Pendulum during the Solar Eclipse of 15 February, 1961," Biblical Astronomer . 1:18, Winter 1981.) See also "Preliminary data about the behavior of a Foucault pendulum during the sun eclipse from 15 february 1961", by G. T. Jeverdan, Gh. Ilie Rusu and V. I. Antonescu. Published in Romanian as "Date preliminare asupra comportarii unui pendul Foucault in timpul eclipsei de soare de la 15 februarie 1961", Analele Stiintifice ale Universitatii "Al. I. Cuza" of Iasi, section I, tom VII, anul 1961, Fasc.2 , p. 457. See also ...
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... describes how this sort of model operates: The triangular pattern on Cymbiola innexa suggests the presence of a "global control element" that turns the pigment-secreting cells on and off in the correct order -- something like a computer-controlled loom! "Given this generating mechanism, some shell patterns are easy to understand. A series of vertical stripes -- that is, stripes running perpendicular to the growing edge -- implies a static distribution of pigment secreting cells in the mantle margin. Where a cell or group of cells is permanently turned on, there is a dark stripe of pigment, and where the cells are dormant, there is an unpigmented space. The complementary pattern -- horizontal stripes, parallel to the growing edge -- results from a temporal rather than a spatial oscillation. All the secretory cells turn off and on in synchrony, so that light and dark bands are left behind on the surface of the shell as the growing edge moves on." All well and good, but some seashells have intricate patterns that require modellers to imagine traveling waves of excitation, oscillating chemical systems, signals that travel faster than chemical diffusion, and longrange synchrony employing a "global control element." These patterngenerating schemes are clever and rather successful on the theoretical level. Indeed, the seashell modellers are rather smug about their accomplishments. (Hayes, Brian; "SpaceTime on a Seashell," American Scientist, 83:214, 1995.) Comment. The seashell modellers, of course, do not have to explain how or why "global control elements" evolved ...
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... we may need a new evolutionary scenario. Good bye Big Bang and expanding universe! (Vogel, Gretchen; "Goodness, Gracious, Great Walls Afar," Science, 274:343, 1996. Vergano, D.; "New Evidence of Cosmic Architecture," Science News, 150:239, 1996) In a related news item, Mexican scientists have proposed that most of the matter in the universe (that elusive "dark" matter) may exist in the form of particles they dub "dilatons." Dilatons might also explain the formation of the aforesaid galactic shells. "The Mexican researchers have explored a situation in which G [the gravitational constant], instead of becoming fixed after gravity separated from the other forces [after the Big Bang], has continued to oscillate by a few per cent. They have found that the mass of dilatons required to allow G to vary in this way could account for all the Universe's dark matter." A consequence of an oscillating G would be a varying rate of expansion for the universe -- a sort of ebb and flow of the whole cosmos. One can then visualize galaxies gradually clustering together into shells much as sand particles drift into ripples under the influence of waves along a beach. (Parsons, Paul; "Weird Matter Makes Gravity Wobble," New Scientist, p. 19, October 5, 1996) Clustering of distant galaxies From Science Frontiers #109, JAN-FEB 1997 . 1997-2000 William R. Corliss ...
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... Science Frontiers ONLINE No. 31: Jan-Feb 1984 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Mercury's orbit explained without relativity A most satisfying element of support for Einstein's General Theory of Relativity (GR) has been its accounting for the residual precession of Mercury's orbit. In recent years, however, a rival explanation has been found in the non-symmetric gravitational field of the sun. Surface oscillations of the sun betray hidden internal rotation, which produces asymmetry in the sun's gravitational field. By applying the distorted field in predicting the orbit of Mercury and the minor planet Icarus, astronomers are more successful than when they use the GR. The authors of this paper claim that GR averages some 2 standard deviations off the mark, while results -using the nonsymmetrical gravitational field of the sun are right on the money! (Campbell, L., et al; "The Sun's Quadrupole Moment and Perihelion Precession of Mercury," Nature, 305:508, 1983.) Reference. For other explanations of the advance of Mercury's perihelion, see AHB1 in our Catalog: The Moon and the Planets. Ordering information at: here . From Science Frontiers #31, JAN-FEB 1984 . 1984-2000 William R. Corliss ...
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... Science Frontiers ONLINE No. 67: Jan-Feb 1990 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Solar Activity And Bursts Of Human Creativity Abstract "In a previous paper, evidence has been reported suggesting a link between historical oscillations of scientific creativity and solar cyclic variation. Eddy's discovery of abnormal secular periods of solar inactivity (' Maunder minimum' type) offered the opportunity to put the present hypothesis to a crucial test. Using time series of flourish years of creators in science, literature, and painting (AD600-AD1800), it was found that, as expected: Cultural flourish curves show marked discontinuities (bursts) after the onset of secular solar excursions, synchronously in Europe and China; During periods of extended solar excursions, bursts of creativity in painting, literature, and science succeeded one another with lags of about 10-15 years; The reported regularities of cultural output are prominent throughout with eminent creators. They decrease with ordinary professionals. "The hypothesized extraterrestrial connection of human cultural history has thus been considerably strengthened." (Ertel, Suitbert; "Synchronous Bursts of Creativity in Independent Cultures; Evidence for an Extraterrestrial Connec tion," The Explorer, 5:12, Fall 1989.) Comment. With apologies to the author, a few minor changes in punctuation have been made above. From Science Frontiers #67, JAN-FEB 1990 . 1990-2000 William R. Corliss ...
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... . We begin with the notion of anthropic cosmology, in which the physical constants of the universe are identified as having just the "right" values to allow the existence of stars, planets, carbon compounds, and the other ingredients of human life. (Just why this state of affairs prevails is a question rarely addressed!) Adherents of anthropic cosmology hold that our "human-friendly" universe is just one of many universes populating a larger metauniverse. These "other" universes are thought to have different values of the fundamental physical constants (viz., the mass of the proton) and, in consequence, wildly different forms of life. In nonhuman universes, there could even be entities for which our word "life" is inadequate. The second idea is that of an oscillating universe. In this concept, universes expand just so far and then collapse back into the "singularities" (i .e ., black holes) from which they arose. Then, Phoenix-like, they bounce back and reexpand into new universes -- ones with slightly different physical constants. These rebounding universes are in a sense mutated universes, which have been slightly modified during the physical trauma of collapsing into singularities. Now comes a stimulating thought. The most abundant sort of universe occupying the metauniverse will be that type that generates the most new black holes during its expansion and contraction phases, for each of its "progeny" can spawn a new universe of its own. As in biological Darwinism, these are the "selected" universes. Some universes may fail to reproduce ...
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... Science Frontiers ONLINE No. 99: May-Jun 1995 Other pages Home Page Science Frontiers Online All Issues Last Issue Next Issue Sourcebook Project Sourcebook Subjects Contents Archaeology The inscribed bricks of comalcalco Ancient modern life and carbon dating Traces of the southern flotilla Astronomy Where have all the black holes gone? Ltps and ets Biology Curious brain asymmetries Did darwin get it all right? When scents make no sense Biological precursors of the 1995 kobe earthquake Geology Ballistic panspermia Geophysics Warning cars rolling uphill ahead 90-DAY SEA-LEVEL OSCILLATION AT WAKE ISLAND Luminous precursors of the 1995 kobe earthquake Psychology The untapped human mind Physics Why does spaghetti break into three pieces instead of two? ...
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... Science Frontiers ONLINE No. 127: Jan-Feb 2000 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Some Funny Things Happened On The Way Around The World Weird things happen in the weightlessness of an orbiting spacecraft. In the many videos shot aboard the Space Shuttle s, we are treated to tools, even gently oscillating globules of water, floating aimlessly in midair. Even stranger are the effects of microgravity on humans and other life forms. Astronauts, for example, when they first arrive in orbit, sometimes perceive their world to be upside-down regardless of their orientation. Their nervous systems were apparently thrown for a loop when the force of gravity was cancelled out. These illusions disappear later in the mission. Speaking of loops, consider the medaka. This fish is the only vertebrate to have mated and laid eggs that developed into offspring in microgravity. Said offspring are doomed to lives of somersaulting swimming. (Wassersug, Richard J.; "Life without Gravity," Nature, 401:758, 1999.) Comment. Could there be a connection to the nervous affliction of tumbler pigeons? See BBB8 in Biological Anomalies: Birds. From Science Frontiers #127, JAN-FEB 2000 . 1997 William R. Corliss ...
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... are monitored by using a solid-state automatically digitizing camera. The movement-activity levels of whole colonies and of isolated groups of workers are studied. Whole colonies of Leptothorax allardycei show rhythmic changes in movement-activity level. Fourier and autocorrelation analyses indicate that the activity levels of colonies are periodic, with an average period of 26 min. Single, isolated workers do not show the pattern of periodic changes in activity level. Single workers become active spontaneously, but at no particular interval. Pairs of workers, confined together, also do not show periodicity in activity level. One worker can stimulate another worker to become active, thus coupling their movement-activity patterns. As ants are placed in larger groups, the variation in the interval between activity peaks declines in a manner predicted by coupled oscillator theory. It is argued that the colony can be regarded as a population of 'excitable subunits.," Activity records from two ant colonies. Time (horizontal axis) is measured in 30-second intervals. (Cole, Blaine J.; "Short-Term Activity Cycles in Ants: Generation of Periodicity by Worker Interaction," American Naturalist, 137:244, 1991.) Comment. The author also pointed out the "formal" or mathematical similarity of the ant movement-activity levels and the dynamics of epidemics! This makes us wonder whether wars, economic cy-cles, etc. might be explained by considering humans as "excitable subunits." From Science Frontiers #76, JUL-AUG 1991 . 1991-2000 William R. Corliss ...
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... "Straight from the Horse's Ear," another report on sound emissions from ears appeared in Nature. Although the body of the article deals with sounds emanating from the ears of chinchillas, humans are not neglected. First, from the abstract: "The inner ear sometimes acts as a robust sound generator, continuously broadcasting sounds (spontaneous otoacoustic emissions) which can be intense enough to be heard by other individuals standing nearby. Paradoxically, most individuals are unaware of the sounds generated within their ears." Second, the article's final sentence: "Apparently, some humans with intense spontaneous emissions owe their hearing loss to internal 'noise' which they are unable to perceive." (Powers, Nicholas L., et al; "Elevation of Auditory Thresholds by Spontaneous Cochlear Oscillations," Nature, 375:585, 1995.) * SF#100 = Science Frontiers #100. From Science Frontiers #101 Sep-Oct 1995 . 1995-2000 William R. Corliss ...
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... : Spring 1980 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Dynamic Dna Smugness over our discovery of the genetic code and some simple features of biological synthesis has recently been undermined by the recognition that the so-called nonsense segments in genes may be important after all. Now comes the realization that the DNA molecule may not be a staid, static construction. Travelling kinks and other disturbances seem to play some unknown role in biological recognition. Some biochemists have even suggested that DNA winds and unwinds or "breathes" like a living thing as it helps to manufacture biological substances. (Spencer, Michael; "Bent DNA," Nature, 281:631, 1979.) Comment. The addition of the time dimension to biological synthesis evokes thoughts of oscillating systems, frequency dependence, filters, etc. Perhaps Nature has invented something better than the silicon chip. From Science Frontiers #10, Spring 1980 . 1980-2000 William R. Corliss ...
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... ? It's the El Nino. El Nino is the name given the annual movement of warm water southward along the western coast of South America. Every few years (range 2-10 years, average about 3 years) this current penetrates much farther south, devastating the fishing industry. Usually the catastrophic El Ninos begin in the eastern Pacific and work westward. The current El Nino is out of phase somehow, beginning in the western Pacific and moving east. (The current extreme drought in Australia is part of this phenomenon.) The more powerful El Ninos are usually associated with severe winters in North America; the opposite is true this time. Obviously, something is amiss with the current El Nino. (Philander, S.G .H .; "El Nino Southern Oscillation Phenomena," Nature, 302:295, 1983.) Reference. Anomalous El Ninos are cataloged at GHT4 in Earthquakes, Tides. This book is described here . From Science Frontiers #27, MAY-JUN 1983 . 1983-2000 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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... . The evidence for such large-scale living systems or super-superorganisms is widely pooh-poohed by biologists because it does not meet their definition of life; i.e ., metabolism, reproduction, etc. But perhaps they are missing something by thinking too small. In this vein, M.G . Bjomerud has opined: ". .. there is no reason to expect that super-organisms would meet criteria based on observations of individual organisms. Isn't it time to consider the possibility that the boundary between life and non-life may be diffuse, non-stationary over time, and dependent on scale?" (Bjomerud, M.G .; "Live Universes," Nature, 385:109, 1997.) Comments. The concept of oscillating universes that mutate to better adapt themselves -- a sort of cosmic Darwinism -- can be found in SF#81/106. F. Hoyle's science fiction tale The Black Cloud speculated about humanity's encounter with an immense, sentient, intelligent molecular cloud! From Science Frontiers #111, MAY-JUN 1997 . 1997-2000 William R. Corliss ...
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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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... Absence of Binaries in Globular Clusters AOB20 Alignment of Axes of Young Stars AOB21 Young Stars with Anomalous Velocities AOF ANOMALIES DETECTED THROUGH STELLAR RADIATION AOF1 Star Color Changes in Historical Times AOF2 Anomalous Variable Objects: A Few Extreme Cases AOF3 Unidentified Objects at the Core of Our Galaxy AOF4 Anomalies of Wolf-Rayet Stars AOF5 Nova and Supernova Anomalies AOF6 Cepheid Anomalies AOF7 Apparent Absence of Bright Carbon Stars AOF8 The "Missing" Solar Neutrinos and, by Extension, Stellar Neutrino Deficits AOF9 Pulsar Anomalies AOF10 Unidentified Infrared Objects in Our Galaxy AOF11 Optical Bursters and Flare Stars AOF12 Flicker Stars AOF13 Supermassive Stars AOF14 Discordant Binaries AOF15 Stars Emitting Excess Infrared Radiation AOF16 Spinning-Up Stars AOF17 Physical Barriers in the Evolutionary Path between Red Giants and White Dwarfs AOF18 Discrete Redshifts in Stellar Spectra AOF19 Gamma-Ray Sources Correlated with Solar Oscillations AOF20 Rapid Variation of Celestial Radio Sources AOF21 Gamma-Ray Objects AOF22 Galactic Sources of Unidentified Radiation AOF23 White-Dwarf Anomalies AOF24 Globular-Cluster "Age' Anomalies AOF25 Infrared Bursters AOF26 Stellar "Age" Anomalies AOF27 Higher Masses of Smaller White Dwarfs AOF28 Historical Disappearance of Stars AOF29 Gamma-Ray Bursters AOF30 X-Ray Bursters AOO EXTENDED GALACTIC OBJECTS AOO1 X-Ray Rings AOO2 Nebular Jets AOO3 The North Polar Radio Spur AOO4 Triangular Appearance of Stars in Telescopes AOO5 Puzzling Nature of Bok Globules AOO6 Jets from Young Stars AOO7 The Red Rectangle AOO8 Herbig-Haro Objects AOO9 Molecular-Cloud Rings AOO10 Infrared Cirrus Clouds AOO11 Diffuse Cartwheel-Like Structures AOX STELLAR-ECLIPSE PHENOMENA AOX1 Anomalous Precession of Eclipsing Binaries AOX2 Anomalous Stellar-Eclipse Light Curves AOX3 Sudden Onsets and Cessations of Stellar Eclipses AP ...
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... Water Geysers and Periodic Springs and Wells [GHQ6] Hydrothermal Earthquake Precursors Hydrothermal Explosions Effect of Earthquakes upon Geyser Activity GHS THE BEWILDERING VARIETY OF TIDES GHS1 Sun-Dominated Tides GHS2 Sea and Lake Seiches... GHS3 Spectacular Tidal Bores GHS4 Diurnal, Triple, and Quadruple Tides GHS5 Long-Period Tides of Unexpected Strengths GHS6 Tides That Precede the Moon Extraordinary Tsunamis Tsunami Cycles GHT OCEAN TURBULENCE AND CIRCULATION PHENOMENA GHT1 Extraordinary Deep Circulation Events GHT2 Sonar-Detected Subsurface Oceanic Structures GHT3 Nonvolcanic Underwater Eruptions GHT4 Anomalous El Ninos GHT5 The Guinea Tide GHT6 Energy Transfer to Hurricanes GHT7 Oceanic Rings and Eddies GHT8 Large-Scale Oceanic Chemical Anomalies Deep-Sea Storms Curious Drifts Gas-Hydrate Blowouts Great Whirlpools and Vortices The Gibraltar Dam Oceanic Megaplumes Gulf-Stream Reversal Oceanic Dead Zones Organized Structures in Bubble Clouds North Atlantic Oscillations El Ninos Correlated with Seismicity GHW REMARKABLE WAVE PHENOMENA GHW1 Unexplained Solitary Waves GHW2 Periodic Bands of Waves GHW3 Sudden, Unexpected Onset of High Surf GHW4 Downstream Progressive Waves in Rivers Increasing Heights of North Atlantic Waves GI INCENDIARY PHENOMENA GIC CYCLIC FIRES Forest-Fire Cycles GIS SUPPOSED SPONTANEOUS COMBUSTION Unexplained Fires GIW REMARKABLE FIRE STORMS The Peshtigo Horror GL LUMINOUS PHENOMENA GLA AURORA-LIKE PHENOMENA GLA1 Auroral Pillars: Natural Searchlight beams GLA2 Sky-Spanning Auroral Arches GLA3 Auroral Meteors: Moving Luminous Patches and Bands GLA4 Low-Level Auroras GLA5 The Odor of the Aurora GLA6 Artificial Low-Level Auroras GLA7 Geographically Displaced Auroras GLA8 Auroras with Unusual Geometries GLA9 Auroras Correlated with Thunderstorms GLA10 Auroras Correlated with Earthquakes GLA11 Auroras Correlated with Meteors GLA12 Close Relationship between Aurora Displays and Clouds GLA13 Glowing Night Skies GLA14 Transient Sky Brightenings GLA15 ...
Terms matched: 1 - Score: 11 - 15 May 2017 - URL: /cat-geop.htm
... Sun and Solar System Debris: A Catalog of Astronomical Anomalies Sorry: Out of Print. No longer available. Our sun, powerhouse of the Solar System and an enigma itself, is orbited by clouds of asteroids, comets, meteors and space dust These "minor objects" cause "major headaches" to astronomers searching for explanations. Typical subjects covered: Solar svstem resonances * Bode's Law and other regularities * Blackness of comet nuclei * Cometary activity far from solar influences * Unidentified objects crossing sun * The 'missing' solar neutrinos * Pendulum phenomena during solar eclipses * Observations of Planet X * Meteorite geographical anomalies * Meteorites from the moon * Long fireball processions * Very long duration meteorites * Zodiacal light brightness changes * [Picture caption: One of the many possible modes of solar surface oscillation] Comments from reviews: "It is an unusual book, nicely executed, and I recommend it highly", Icarus. 288 pages, hardcover, $17.95, 66 illustrations,4 indexes 1986. 874 references, LC 86-60231, ISBN 915554-20-8 , 7x10 format. Stars, Galaxies, Cosmos: A Catalog of Astronomical Anomalies Sorry: Out of Print. No longer available. Did the Big Bang really begin the existence of all we know? Do we honestly know how the stars (and our sun) work? Can we rely on Newton's Law of Gravitation? According to this volume the answer seems to be "Probably not ! " Typical subjects covered: Optical bursters and flare stars * Estorical color change of Sirius * Infrared ...
Terms matched: 1 - Score: 5 - 10 Oct 2021 - URL: /sourcebk.htm