223 results found.
... Science Frontiers ONLINE No. 10: Spring 1980 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Double hubble: age in trouble A key concept in modern astronomy -- the distance scale -- has been challenged by a new measurement technique. In recent years, the so-called Hubble Constant has been used to determine the distances of the farthest observable galaxies and, by assuming that they are near the periphery of the expanding universe, obtaining the age of the cosmos by dividing distance by the speed of light. Until this current challenge, the age of the universe was generally taken as about 20 billion years. The "old" Hubble Constant, however, was determined from the measurements of the distances to rather close galaxies and then assuming that the Constant thus derived held for the entire universe. The new yardstick reaches farther out into space. It is based upon the observation that the broadening of galaxy's 21-centimeter radio emission depends upon its rate of rotation, plus the belief that the rate of rotation is proportional to its brightness! This "new" Hubble Constant is 95 kilometers/second/ megaparsec, which translates into an age of only 10 billion years for the universe. Both the 10-billion-year and 20billion-year camps claim strong supporting evidence for themselves and also point to serious difficulties in the opposing method. The stage is thus set for a delightful controversy. (Hartline, Beverly Karplus; "Double Hubble: Age in Trouble," Science, 207: 167, 1979.) ...
Terms matched: 1 - Score: 148 - 15 May 2017 - URL: /sf010/sf010p03.htm
... Science Frontiers ONLINE No. 101: Sep-Oct 1995 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Polar-bear bones confound ice-age proponents Given the unquestioning fealty accorded the Ice Ages, it is not especially odd that the information reported below has not received wider circulation. In 1991, construction workers at Tysfjord, Norway, 125 miles north of the Arctic Circle, accidentally dug up polarbear bones that were later radiometrically dated as at least 42,000 years old, probably 60,000. R. Lie, a zoologist at the University of Bergen, and other scientists subsequently found the bones of two more polar bears in the area. These were dated as about 20,000 years old. An associated wolf's jaw was pegged at 32,000 years. The problem is that Norway and many other northern circumpolar lands are believed to have been buried under a thick ice cap during the Ice Ages. In particular, northern Norway is thought to have been solidly encased in ice from 80,000 to 10,000 years ago. Polar bears could not have made a living there during this period. Clearly, something is wrong somewhere. (Anonymous; "Polar Bear Bones Cast Doubt on Ice Age Beliefs," Colorado Springs Gazette , August 23, 1993. An Associated Press dispatch. Cr. S. Parker. A COUDI item. COUDI = Collectors of Unusual DataInternational) An associated conundrum. Some authorities have stated that polar bears evolved recentlyonly 10,000 years ago! Polar bear evolution is discussed ...
Terms matched: 1 - Score: 125 - 15 May 2017 - URL: /sf101/sf101g08.htm
... Science Frontiers ONLINE No. 97: Jan-Feb 1995 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects The Age Of Fire And Gravel Back in 1883, I. Donnelly wrote his seminal Ragnarok , to which he attached as a subtitle: The Age of Fire and Gravel . He hypothesized that all those sheets of unconsolidated rocky debris strewn across the planet--called the "drift" -- were the consequence of impacts of comets. But in Donnelly's day, all geologists were uniformitarians and wedded to glacial theory. Donnelly's "age of fire and gravel" was really a succession of Ice Ages. Quite a difference in mechanism! Glacial theory, however, has difficulty in explaining apparent glaciations during periods when the earth was supposed to be very warm. Nor does it account easily for glacial-like debris in equatorial regions. With the current ascendancy of "impact geology," some brave geologists are reinterpreting supposed glacial deposits in terms of sheets of ballistic ejecta from the impacts of comets and/or asteroids. Modern estimates of terrestrial cratering suggest that 10% of our planet's surface could be covered by 10+ meters of ejecta, and 2% by 200+ meters. Now that's a lot of ejecta! (Rampino, Michael R.; "Tillites, Diamictites, and Ballistic Ejecta of Large Impacts," Journal of Geology, 102:439, 1994.) Comment. The Ice Ages won't be melted completely away by such reinterpretations. Nor will I. Donnelly ...
Terms matched: 1 - Score: 117 - 15 May 2017 - URL: /sf097/sf097g11.htm
... 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 An Age Paradox "Cosmologists say the universe may be 8 to 15 billion years old. Stellar astronomers disagree. They say the oldest stars are much older, perhaps 16 to 19 billion years old. Because the oldest stars can't be older than the universe in which they lie, this age paradox presents a thorny problem for astronomers." At least two solutions to the paradox are possible: (1 ) The cosmological distance scale used to determine the age of the universe is incorrect; and/or (2 ) Our theories about how stars work and evolve are in error. Something has to give. (Jayawardhana, Ray; "The Age Paradox," Astronomy, 21:39, June 1993.) Comment. Also pertinent here are H. Arp's collection of red-shift anomalies, which also call into question the cosmological distance scale; and those missing solar neutrinos, which cast doubt on our ideas about how stars work. H. Arp's redshift anomalies are cataloged in AQB and AWB in our catalog: Stars, Galaxies, Cosmos. To order, see: here . From Science Frontiers #89, SEP-OCT 1993 . 1993-2000 William R. Corliss ...
Terms matched: 1 - Score: 106 - 15 May 2017 - URL: /sf089/sf089a03.htm
... Science Frontiers ONLINE No. 59: Sep-Oct 1988 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Did an asteroid impact trigger the ice ages?Asteroids and comets are being blamed these days for more and more of our planet's catastrophism -- biological, meteorological, and geological. What a turnabout in scientific thinking in just a decade. F.T . Kyte et al have now provided additional details on meteoritic debris they first described in 1981. On the floor of the southeast Pacific, about 1400 kilometers west of Cape Horn, about 5 kilometers down, they found high concentrations of iridium in Upper Pliocene sediments about 2.3 million years old. Since the proposed projectile hit in very deep water, no crater was dug out. What did survive is called an "impact melt." This is debris rich in noble metals, such as iridium, and contains particles typical of a low-metal mesosiderite. Some 600 kilometers of the ocean floor received this debris. Kyte and his associates estimate the size of the impacting object at at least 0.5 kilometers in diameter. No biological extinctions are correlated with the 2.3 -million-year date, but there appears to have been a major deterioration of climate at about this time. There was a shift in the marine oxygen isotope records and, more obvious, the creation of the huge loess (sandy) deposits in China. What the impact may have done is to vaporize enough water into the atmosphere to increase the earth's albedo, ...
Terms matched: 1 - Score: 95 - 15 May 2017 - URL: /sf059/sf059p12.htm
... Science Frontiers ONLINE No. 20: Mar-Apr 1982 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects The Mystery Of Spontaneous Visions This fascinating survey of visionary experience during the Middle Ages is more valuable as a thought-provoker than an anomaly collection, although one might claim that any spontaneous vision is anomalous. The authors went back in history and examined a host of documents from the Middle Ages -- the lives of saints, histories, biographies, etc. They identified visionary experiences and explored the biological and sociological contexts. Kroll and Bachrach found 134 visions; that is, experiences that had no objective reality. We call such experiences hallucinations today; and their contents were the same then as they are now. What the authors are after in this study are the perceptions of the visionary experiences by the community. The survey demonstrated immediately that the visions of the Middle Ages appeared to all types of people, not just saints and seers; and, further, that most of the 134 experiences were unrelated to physical and mental health. It was also obvious that the various communities readily accepted these visions as bona fide spiritual and parapsychological experiences. In other words, they were taken as messages from God, predictions of future events, marks of spiritual favor, etc. Kroll and Bachrach concluded that in the Middle Ages visions were culturally supported phenomena and not evidences of psychological illness, as they are today. (Kroll, Jerome, and Bachrach, Bernard; "Visions and Psychopathology in the Middle Ages," Journal of Nervous and ...
Terms matched: 1 - Score: 79 - 15 May 2017 - URL: /sf020/sf020p13.htm
... Science Frontiers ONLINE No. 44: Mar-Apr 1986 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Of Dust Clouds And Ice Ages Ice cores from the polar ice at Camp Century, in Greenland, have been analyzed for the presence of cosmic dust. "It is concluded that on five occasions during the interval 20,000-14,000 years BP, cosmic dust mass concentrations in the solar system rose by one and two orders of magnitude above present day levels. Moreover if the particles found in these ice core samples are indicative of the particle size distribution which prevailed in the interplanetary medium at that time, then it may be concluded that the space number density of submicron sized particles must have uncreased by a factor of 105 or more. During these times the light transmission properties of the solar system would have been significantly altered resulting in major adverse effects to the earth's climate. Thus it is quite possible that these dust congestion episodes were responsible for the abrupt climatic variations which occurred toward the end of the last Ice Age." Whence these interplanetary dust clouds? The author of this article ruled out terrestrial volcanism (an insufficient source of iridium) and encounters with asteroids and cometary tails (too infrequent to account for the long periods of high dust levels). Rather, the dust source may have been the same event that created the recently discovered dust ring between Mars and Jupiter, which is believed to be only a few tens of thousands of years old. The nature of the "event" is not ...
Terms matched: 1 - Score: 78 - 15 May 2017 - URL: /sf044/sf044p12.htm
... Science Frontiers ONLINE No. 3: April 1978 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Immense Circular Terrestrial Structures Of Great Age J.M . Saul has analyzed many topographic and geological maps and discovered faint circular terrestrial patterns that have mostly not been described before. These circles measure between 7 and 700 kilometers in diameter and are nearly perfect geometrical figures. The rims of the circles are generally raised and characterized by fracturing and brecciation. These structures can be traced in many geological environments and rocks of all ages. They control to an extraordinary extent regional geology and ore mineralization. To date, some 1,170 circles have been discovered, of which more than half can be visually traced for 360 . Larger circles may exist; one with a diameter of about 2,200 kilometers seems to encircle the southern end of Africa. In the United States, the centers of the circles fall in a northwesterly trend in Arizona; northeasterly in the Appalachians. These circular structures may have been created about 4 billion years ago by intense meteorite bombardment similar to and perhaps identical with the bombardment that marked the surfaces of the moon and other inner planets. (Saul, John M.; "Circular Structures of Large Scale and Great Age on the Earth's Surface," Nature, 271:345, 1978.) Reference. Huge craters and other large circular structures are cataloged at ETC1 and ETC2 in Carolina Bays, Mima Mounds. To order this volume, visit: here . From Science Frontiers #3 , April 1978 . 1978 ...
Terms matched: 1 - Score: 78 - 15 May 2017 - URL: /sf003/sf003p07.htm
... Science Frontiers ONLINE No. 16: Summer 1981 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects A MARTIAN ICE AGE?Long, sinuous depressions called "outflow channels" are concentrated in the equatorial regions of Mars. They clearly resemble terrestrial stream beds and have been attributed to water action. The ancient Spokane Flood that carved our Washington State's channeled scablands is seen as an apt terrestrial analogy. The Martian channels, however, are much larger than the water-eroded terrestrial analogs. The authors of the subject paper suggest that ice rather than water created the Martian channels, pointing out that terrestrial ice-stream and glacier landforms are much closer to the Martian features in terms of scale. (Lucchitta, Baerbel K., et al; "Did Ice Streams Carve Martian Outflow Channels?" Nature, 290:759, 1981.) Comment. This suggests the possibility that earth and Mars may have had synchronous Ice Ages due to solar variations or, perhaps, the envelopment of the entire solar system by a huge cloud of absorbing matter. From Science Frontiers #16, Summer 1981 . 1981-2000 William R. Corliss ...
Terms matched: 1 - Score: 72 - 15 May 2017 - URL: /sf016/sf016p03.htm
... Science Frontiers ONLINE No. 62: Mar-Apr 1989 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects DANCING TO THE COMETS' TUNE "When planetary scientists examine one kind of meteorite rich in iron, the H-chondrites, they find that the meteorites' ages do not spread evenly through time. Instead, the ages seem to cluster at 7 and 30 million years." Astronomers have hitherto been content to attribute these clumped ages to collisions among the meteorites' parent bodies - the asteroids - which ply periodic orbits. However, S. Perlmutter and R.A . Muller, at Berkeley, point to the apparent 26- to 30-million-year periodicities of three terrestrial phenomena: Biological extinctions in the fossil record, Magnetic field reversals, and Terrestrial-crater ages. Could there be a connection between the clumped meteorite ages and these terrestrial phenomena? Perlmutter and Muller propose that all of these phenomena are the consequence of periodic storms of comets that invade the inner solar system from the direction of the Oort Cloud of comets that purportedly hovers at the fringe of the solar system. These comets not only devastate the earth but also collide with the asteroids, knocking off those bits and pieces we call meteorites. (Anonymous; "Do Meteorite Ages Tell of Comet Storms?" Astronomy, 17:12, January 1989.) Comment. Unanswered above is the question of why comet storms should be periodic. One hypothesis is that Nemesis, the so-called Death Star, a dark companion of our sun, lurks ...
Terms matched: 1 - Score: 61 - 15 May 2017 - URL: /sf062/sf062a05.htm
