9 results found.
... Science Frontiers ONLINE No. 56: Mar-Apr 1988 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Wandering Molluscs "How could a mollusc which lived all its adult life cemented fast to the seabed in shallow water occur thousands of kilometers apart in the Arabian Gulf and the Caribbean? Almost identical forms of the extinct bivalve Torreites sanchezi have been found in rocks from the Caribbean and the Gulf. Peter Skelton of the Open University and Paul Wright of the University of Bristol suggest that the larval stage of the bivalve must have 'island hopped.'" The two researchers rule out convergent evolution and note that the two seas were never any closer together. They suppose that in Cretaceous times there was an equatorial current that swept the larval forms long distances. (Anonymous; "Wandering Molluscs," New Scientist, p. 33, October 15, 1987.) Comment. The same situation prevails for other species, such as some of the amphipods and the unique life forms dependent on seafloor vents. From Science Frontiers #56, MAR-APR 1988 . 1988-2000 William R. Corliss ...
Terms matched: 1 - Score: 78 - 15 May 2017 - URL: /sf056/sf056b08.htm
... Science Frontiers ONLINE No. 50: Mar-Apr 1987 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Lunar Magnetic Mollusc From the abstract of a paper in Science: "Behavioral experiments indicated that the marine opisthobranch mollusk Tritonia diomedea can derive directional cues from the magnetic field of the earth. The magnetic direction toward which nudibrachs spontaneously oriented in the geomagnetic field showed recurring patterns of variation correlated with lunar phase, suggesting that the behavioral response to magnetism is modulated by circa-lunar rhythm." The magnetic and lunar-phase detectors of this mollusc are not known. In fact, the authors remark in their introductory paragraph that, even in organisms possessing ferromagnetic materials in their systems, there exists no "direct neurophysiological evidence implicating ferromagntic particles in the the detection of magnetic fields." (Lohmann, Kenneth J., and Willows, A.O . Dennis; "LunarModulated Geomagnetic Orientation by a Marine Mollusk," Science, 235:331, 1987.) From Science Frontiers #50, MAR-APR 1987 . 1987-2000 William R. Corliss ...
Terms matched: 1 - Score: 69 - 15 May 2017 - URL: /sf050/sf050p11.htm
... Science Frontiers ONLINE No. 19: Jan-Feb 1982 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Species Stability Is A Real Problem The reader should refer to the following item for the basic paleontological facts discussed by Williamson. The biological implications of the mollusc lineages drawn up by Willianson are rather profound. In the present item, Williamson complains that scientists and critics have focussed primarily upon his claim that his mollusc lineages support the punctuated evolution model (which they do) but avoid his main point: namely, that the lineages are static over very long periods of time. They do not change slowly, bit by morphological bit, into new species as an evolutionist would expect. Instead, they remain un-changed until they become extinct. This striking aspect of the fossil record is not predicted by neo-Darwinism -- and there is the rub! (Williamson, Peter G.; "Morphological Stasis and Developmental Constraint: Real Problems for Neo-Darwinism," Nature, 294:214, 1981.) Comment. In neo-Darwinism, evolution unfolds by small accumulated changes, the causes of which may be chemicals in the environment, nuclear radiation, and other "stresses." Neo-Darwinism goes hand-in-hand with geological Uniformitarianism, both of which are favored philosophically by scientists because slow change is more amenable to scientific explanation. The large sidewise steps of punctuated evolution are difficult to explain in terms of known "forces." In this context, the radical concepts of directed panspermia and the impact ...
Terms matched: 1 - Score: 27 - 15 May 2017 - URL: /sf019/sf019p06.htm
... Science Frontiers ONLINE No. 19: Jan-Feb 1982 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects African Fossil Sequences Support Punctuated Evolution East of Lake Turkana, in northern Kenya, the geologist finds exceptionally fine sequences of fossil molluscs in old lake deposits. Williamson has scrutinized the distribution of some 190 faunas with high stratigraphic resolution; that is, he believes he has been able to sketch for the first evolutionary events on a fine time scale. Williamson underlines three important observations: (1 ) Species seemed to arise suddenly, as predicted by the "punctuated evolution" model; (2 ) The formation of new species was accompanied by marked developmental instability in the transitional forms; and (3 ) All lineages were morphologically stable for long periods -- they did not change form! The biological implications of this important study are summarized in the preceding item. (Williamson, P.G .; "Palaeontological Documentation in Cenozoic Molluscs from Turkana Basin," Nature, 293:437, 1981.) Comment. Evolutionists have often bewailed the obvious lack of transitional forms (missing links) in the stratigraphic record. According to Williamson's results, transitional forms would be few in number and display considerable morphological instability. In essence, this means that missing links may not exist in a practical sense. If this is true, one wonders whether those famous evolutionary family trees in all the textbooks, such as that of the horse, are really misleading. From Science Frontiers #19, JAN-FEB 1982 . 1982-2000 ...
Terms matched: 1 - Score: 25 - 15 May 2017 - URL: /sf019/sf019p07.htm
... Science Frontiers ONLINE No. 50: Mar-Apr 1987 Other pages Home Page Science Frontiers Online All Issues Last Issue Next Issue Sourcebook Project Sourcebook Subjects Contents Archaeology Hardball for Keeps Connecticut "Boat" Cairn "High"-tech Farming At Tiahuanaco Astronomy The Cosmological Atlantis Mysterious Bright Arcs May Be the Largest Objects in the Universe Too Many Short-period Comets Quantized Galaxy Redshifts The Fossil Record and the Quantization of Life! Biology Whales and Seafloor Pits Strange Patterns in Another Oceanic Habitat Lunar Magnetic Mollusc Monarchs Slighted -- sorry! Did We Learn to Swim Before We Learned to Walk? How Cancers Fight Chemotherapy The Melanic Moth Myth Chain of Crevicular Habitats? Feathered Flights of Fancy Geology Why Are Antarctic Meteorites Different? More on the Soviet Plume Events Geophysics Sympathetic Lightning Ball Lightning Burns A Rayed Circle on A Shed Wall Magnetic Precursors of Large Storms On the Trail of the Fifth Force Psychology Do You Hear What I Hear? Mind-bending the Velocity Vectors of Marine Algae ...
Terms matched: 1 - Score: 15 - 15 May 2017 - URL: /sf050/index.htm
... Science Frontiers ONLINE No. 56: Mar-Apr 1988 Other pages Home Page Science Frontiers Online All Issues Last Issue Next Issue Sourcebook Project Sourcebook Subjects Contents Archaeology Ubiquity of american archeological anomalies Astronomy How to be unfamous in astronomy Celestial mirages? Do black holes exist? Cometary scars on the moon? Biology The fault, dear reader, is not in our stars but our pigs! Not the normal type of fire Wandering molluscs Geology Large moon essential to the development of life? Oceans from space Geophysics Edinburgh ufo a mirage? Wave-bands in calm waters and biscay boils A WEST COAST MOODUS? Psychology Reincarnation of ramanujan? Nudging probability General The new holism -- but is it whole enough? ...
Terms matched: 1 - Score: 15 - 15 May 2017 - URL: /sf056/index.htm
... Science Frontiers ONLINE No. 78: Nov-Dec 1991 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Who was manufacturing what?Between 240,000 and 750,000 years ago, someone in the northern Jordan Valley made a flat, polished plank, 25 centimeters long, from a willow tree. The area where the plank was found is Middle Pleistocene in age and rich in stone tools as well as fragments of wood. (" Mollusc Confirms Dating of Oldest Known Plank," New Scientist, p. 14, July 20, 1991.) From Science Frontiers #78, NOV-DEC 1991 . 1991-2000 William R. Corliss ...
Terms matched: 1 - Score: 15 - 15 May 2017 - URL: /sf078/sf078a02.htm
... 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 Whale falls: stepping stones across the ocean abysses Unique biological communities flourish at widely separated "oases" on the deepsea floors, where hydrothermal vents supply the energy and chemicals necessary for life. Here are found free-living bacteria, tube worms, molluscs, and several other species that prosper without the benefit of photosynthesis. These chemosynthetic, thermal-vent communities are separated by thousands of kilometers of sea-floor "desert." Yet, the species involved are similar worldwide and must, at some time, have crossed these wide, forbidding expanses. One possible mechanism for this mysterious dispersion came in 1987, when the research submersible Alvin chanced upon the remains of a 21-meter whale at a depth of 1,240 meters off California's coast. The whale's skeleton was covered with bacterial mats like those at the hydrothermal vents. Also sustained by the carcass were mussels, snails, and worms; all in all, a community much like those at the vents. Furthermore, many of the species partaking of the whale's energy and chemical resources are not normally found in that part of the Pacific. Subsequently, more "whale falls" with attached biological communities were found elsewhere. Calculations suggest that whale falls are more common that one might suppose -- perhaps occurring with average spacings of only 25 kilometers. They could very well be the stepping stones that allow hydrothermal vent communities to disperse across the ...
Terms matched: 1 - Score: 15 - 15 May 2017 - URL: /sf088/sf088b08.htm
... Science Frontiers ONLINE No. 125: Sep-Oct 1999 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Snail-Trail Tale Homing pigeons home for sure. Many mammals, possibly even humans, also possess a homing instinct. But snails? Taxonomically lowly molluscs? But read this letter to the London Times. "For ten days I have tried to banish a large snail which threatens soon-toemerge seedlings. Each day the snail gets lobbed into long grass of a nearby paddock and each night it quits the paddock, crosses a concrete driveway and returns to lurk under its favourite rock. There is no question of mistaken identity because its shell was marked with white paint after the first return trip." (Roberts, M.I .L .; "Snail Tale," London Times, May 21, 1999. Cr. A.C .A . Silk.) References. Human homing capabilities (BHT18 in Humans I); other mammals (BMT2 in Mammals I); birds (BBT5 in Birds). Snail heading home! From Science Frontiers #125, SEP-OCT 1999 . 1999-2000 William R. Corliss ...
Terms matched: 1 - Score: 15 - 15 May 2017 - URL: /sf125/sf125p05.htm
