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... Science Frontiers ONLINE No. 61: Jan-Feb 1989 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Synchronous Rhythmic Flashing Of Fireflies We humans are pretty smug about our ability to communicate complex messages via sound waves. Of course, we recognize that whales and other cetaceans also seem to "talk" to one another, and that other animals employ their sense of smell for relaying messages. But most of us do not realize that lowly fireflies congregate to communicate en masse, with untold thousands of individuals cooperating in huge synchronized light displays. In reading some of the descriptions of these great natural phenomena, one recalls the light displays used to communicate with the aliens in the movie Close Encounters of the Third Kind . J. Buck has been studying flashing fireflies for over half a century. In fact, his first review paper was published in 1938. Buck has now brought that paper up to date in the current Quarterly Review of Biology with a 24page contribution. It is difficult to do justice to this impressive work in a newsletter. Our readers will have to be satisfied with a mere two paragraphs, in which Buck summarizes some of the incredible synchronies. "More than three centuries later Porter observed a very different behavior in far southwestern Indiana in which, from the ends of a long row of tall riverbank trees, synchronized flashes '. .. began moving toward each other, met at the middle, crossed and traveled to the ends, as when two pebbles are dropped simultaneously into the ends of a long narrow tank of water ...
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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 Aerial Bioluminescence January 19, 1991. South China Sea. Aboard the m.v . Benavon . The vessel was heading for Singapore on a body of water noted for bioluminescent displays. Flashes of light were seen in the bow wave and the ship's wake, appearing to be both on the surface and slightly below. This type of display is rather common, but another, much rarer phenomenon was also present: In 1880 off the Malabar Coast of India, a vessel was engulfed in great waves of light floating above the sea. "At the same time as the above form of bioluminescence, there seemed to be a second type but it was difficult to pinpoint the source. The effect was that the atmosphere around the ship and extending to the horizon had some form of faint white illumination not provided by the light in the water, which was black apart from the previously described flashes. On the other hand, there was no obvious source in the sky either, which although virtually cloudless was very dark, and certainly darker than the atmosphere at the level of the ship. The only conclusion that the observers could come to was that this was a faint example of (to quote The Marine Observer's Handbook ), 'luminescence in the air a few feet above the sea surface when there is no light in the water'. This form lasted for about 30 minutes, whereas the bright flashes continued for ...
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... 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 Dragon fish see red Most fish that make a living in deep, 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 ...
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... Science Frontiers ONLINE No. 38: Mar-Apr 1985 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Quasar, quasar, burning bright; what shifts your spectral light?T. Heckman, of the University of Maryland, has ordained that the apostles of noncosmological redshifts must now recant. He and his colleagues believe that they now have the most convincing demonstration to date that quasar redshifts are of cosmological origin; that is, the larger the redshift, the faster the quasar is receding and the farther away it is. "Availing themselves of the extraordinary new imaging and spectroscopic capabilities of charge-coupled-device (CCD) detectors, they have measured the redshifts of 19 nebulous objects that appear to be companion galaxies of 15 relatively low-redshift quasars. Observing at the Kitt Peak 4-meter telescope, they have determined that, in 18 of these 19 cases, the apparent companion has a redshift very close to that of the quasar. While Burbidge, Arp and their partisans may argue that quasars are so peculiar that they can generate redshifts of unknown origin, this position becomes difficult to maintain for companion galaxies that otherwise look perfectly ordinary." H. Arp and G. Burbidge, chief among those ordered to recant, are not convinced. Arp points to many cases where bridges of luminous material connect high-redshift quasars with low redshift galaxies. Also, the clustering of quasars around nearby galaxies supports the nearness of quasars. As Burbidge has observed, if: ". .. just one large redshift is not due ...
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... Science Frontiers ONLINE No. 134: MAR-APR 2001 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Bigfoot Mile-high, But Light-years From Acceptance Colorado is not prime Bigfoot country. Most Bigfoot reports come from the Pacific Northwest. Nevertheless, enough Bigfoot sightings, hearings, and footprints have accumulated in the Rockies for the Denver Post to print a lengthy review of the Bigfoot phenomenon. The article identifies three Colorado hotspots: (1 ) Leadville, where the Little Creek Monster was reported as early as the 1880s; (2 ) the southern San Juan Mountains; and (3 ) Pike National Forest. A few reports even come from the plains east of the Front Range. Coloradans have reported seeing the animals walking along a stream below Loveland Pass, drinking from a pond in the Lost Creek Wilderness, running after deer in the Roosevelt National Forest, chasing cars near Gypsum and roaring at hikers, campers and fishermen in various locations. The reports have come from scientists, wildlife biologists and elk hunters. Surely, this enough to convince everyone of Bigfoot's reality. Not so! To recognize Bigfoot officially scientists must have a living specimen, a corpse, or at least an good skeleton. They do not. Even though there are thousands of Bigfoot sightings recorded continent-wide plus hundreds of casts of huge footprints, these are not enough. Just as with UFOs and sea monsters, fraud and misidentification abound in that field of endeavor called "cryptozoology." However, bigfoot researchers do have one advantage over ...
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... Science Frontiers ONLINE No. 48: Nov-Dec 1986 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects The Deflationary Universe One of our major astronomical targets in Science Frontiers has been the cosmological redshift; that is, the assumption that an object's redshift is entirely a Doppler effect and, when coupled to the expanding universe concept, is proportional to distance. Well, we don't have any more contradicting data (of which there is plenty), but we do have: (1 ) A new theory which shows how noncosmological redshifts can occur; and (2 ) Laboratory demonstrations of "spectral noninvariance" that show how a non-Doppler component can be added to light's redshift. The physicist behind this new research is E. Wolf, at the University of Rochester. His theoretical work was re-ported in the March 3l, 1986, issue of Physical Review Letters. There he showed how quasars and so-called "superluminary" astronomical sources might emit light with a spectrum that evolves as it travels through space. Scientists have always assumed that once light left its source its spectrum remained unchanged. But Wolf shows how spectral changes are "sort of coded into the light due to correlations in the source." Meanwhile, two of Wolf's colleagues have backed up his theory in the lab. The consequences of Wolf's work would in effect shrink the universe, because objects would not be as far away as we now calculate from their redshifts. The size of the universe might contract ...
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... Science Frontiers ONLINE No. 132: NOV-DEC 2000 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects It Depends on How you Look at It!The "Face on Mars," that is; that eroded hill in the Cydonia region that vaguely resembles a human face. When a recent photo of the "Face" taken by the Mars Global Surveyor (MGS) was published far and wide in the science press, we thought the matter had finally been settled. The photo showed a strange hill obviously sculpted by natural forces. No question about it; there was not a soupcon of artificiality. But it now seems that if you look at the "Face" at other lighting angles and process the same data in different ways, the "Face" reappears looking more artificial than ever. T. Van Flandern elaborates: The MGS spacecraft took a high resolution photo of the "Face on Mars" in April 1998. That image suffered from four handicaps: a low viewing angle; a low sun angle from the direction of under the "chin"; an almost complete lack of contrast; and enough cloudiness to scatter most of the light and eliminate shadows. To add to these difficult circumstances, JPL-MIPL [Jet Propulsion Laboratory-Mission Image Processing Laboratory] personnel, apparently judging that the controversy over artificiality would not be ended when the actual photo was released, processed the image through two filters having the effect of flattening and suppressing image details. This step is documented at a JPL web site. Here we ...
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... Science Frontiers ONLINE No. 95: Sep-Oct 1994 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects A DEEP-SEA HYDROTHERMAL VENT INSTEAD OF A WARM LITTLE POND?If earth life didn't arrive from outer space (See under ASTRONOMY.), it may have arisen a couple miles below the ocean's surface at hydrothermal vents. The curious glows recently remarked at these vents (SF#87) have stimulated much speculation as to the potential role of these glows in the origin of life: "The history of hydrothermal activity predates the origin of life, and light in the deep sea has been a continuous phenomenon on a geological time scale and may have served either as a seed or refugium for the evolution of biological photochemical reactions or adaptations." We formally classify this item under GEOPHYSICS because scientists are still pondering how these glows are created. Some of the light is obviously black-body radiation from the very hot (350 C) water but: ". .. other potential, narrow-band sources of light may be superimposed on the blackbody radiation spectrum, including crystaloluminescence, Cerenkov radiation, chemiluminescence, triboluminescence, sonoluminescence, and the burning of methane in supercritical water." (Van Dover, Cindy Lee, et al; "Light at Deep Sea Hydrothermal Vents," Eos, vol. 75, 1994.) Comment. If cold, diffuse molecular clouds in deep space can synthesize glycine, imagine what the hot, chemically-rich fluids around hydrothermal vents might be able to do. ...
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... Science Frontiers ONLINE No. 123: May-Jun 1999 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects The Storm-Swept Cosmos Snug and comfy beneath our insulating atmosphere and magnetosphere, we muse glibly about voyages to the stars and wonder whether extraterrestrials may already have established galactic civilizations. What we often ignore is the fact that forces and energies almost beyond our comprehension course through the cosmos. Even the Starship Enterprise could not really survive out there. Three cautionary tidits will illustrate the hazards as well as our ignorance of them. "What could possibly accelerate a single subatomic particle to such a high speed, 99.99999999999999999999 percent that of light, that it would smash into the earth's atmosphere with the energy of a hard-hit tennis ball? If you don't have a clue you're not alone. These particles are ultra-high-energy cosmic rays, which are billions of times more energetic than the run-of-the-mill cosmic rays that continuously bombard earth's atmosphere." (Anonymous; "Space Streakers," Astronomy, 27:34, March 1999.) "The most powerful explosion ever ever observed -- a deep space eruption detected in January -- released in just seconds a burst of energy equal to billions of years of light from thousands of suns. Researchers say in studies to be published today that the explosion, called a gamma-ray burst, occurred 9 billion light years from earth. What caused the explosion is a mystery." (Anonymous ...
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... 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 Celestial mirages?Those mysterious giant blue arcs mentioned above have at least two explanations. The less-favored states that the arcs are formed when a spherical light pulse from a briefly flaring quasar encounters a plane of gas and dust. This matter scatters the light, making it visible to us as a huge arc. The preferred model employs gravitational lensing. Here, the arcs are simply distorted images -- mirages, if you want -- of distant galaxies. (Two of the many reports on this subject are: Waldrop, M. Mitchell; "The Giant Arcs Are Gravitational Mirages," Science, 238:1351, 1987; and Anonymous; "Giant Arcs: Light Echoes or Lensed Galaxies?" Sky and Telescope, 75:7 , 1988.) Comment. A bit of background: according to Einstein, the presence of matter can bend light rays, just as our atmosphere does when mirages are created by refraction. Gravitational mirages of celestial objects are thus predicted by Relativity. From Science Frontiers #56, MAR-APR 1988 . 1988-2000 William R. Corliss ...
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