scientific american - 1997 05 - the 100 - year weather forecast
scientific american - 1997 05 - the 100 - year weather forecast
... preda-tors. Once the cubs can move, though, the mothers bring them out into the open to join the rest of the pride. If anyof the other females have cubs, theyform a crèche and remain in near-con-stant ... offered to them, somehome owners will balk at the idea ofselling their excess electricity at a dis-count to the local utility, which then re-sells the power for several times the price. The biggest ... ENERGYBearing down on the drill, a sur-geon bores a two-centimeter-wide hole into the top of Rus-sell D. Sherman’s skull. Sherman hardlynotices. Conscious and smiling, the 6 9- year- old plumber from...
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scientific american - 1996 05 - the comets' lair
... Among the most com-mon mines in this group are the Italianscatterable mines TS-50 and SB-33 and the hand-laid VS-50 and VAR-40, the U.S made M14, and the Chinese Type72. Typically, these weapons ... Space Adminis-tration unveiled the X-36 the first high-performance jet withno tail at all. Remotely controlled and powered by a cruise-mis-sile engine, the 5.4-meter-long, 600-kilogramscale ... case. The type of mine, the specifics of itsoperation, its position on the ground, the position of the victim and the char-acteristics of the environment at the ex-plosion site all affect the...
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scientific american - 1997 03 - the rising seas - how much of a threat
... polydiacety-lene film, which happens to be blue. But the binding of E. coli toxin to the otherpart of the molecule (the cell-surface re-ceptor) breaks the links joining the lip-ids to one another, ... the way from the sun’s in-terior to the earth and out to the farthestreaches of the solar wind. Some of its in-struments are now poised to resolve sev-eral other mysteries. Two of them, the GOLF ... this instru-ment therefore outlines the shapeof the sun’s wind. So far these mea-surements indicate that the solarwind is more intense in the equa-torial plane of the sun than over the north...
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scientific american - 1997 06 - the microchip that rewires itself
... of bird-watchers, and theylove the birds. And after they watchthem, they go home and put up theirbug zappers. These birds, even the seed eaters, are feedingheavily on insects whenthey’re ... CRAWFORDCopyright 1997 Scientific American, Inc.News and Analysis Scientific American June 1997 31But the videotapes revealed that dis-satisfied females rarely assume the prop-er position for ... traveling the interstatesince the wee hours of the morn-ing and what they might saywhen they arrive at the Capitoland meet with their elected rep-resentatives. Most of his audi-ence probably...
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scientific american - 2004 05 - the time before time
... disrupting the signals between neurons. COPYRIGHT 2004 SCIENTIFIC AMERICAN, INC.28 SCIENTIFIC AMERICAN MAY 2004In the 18 years since they were dis-covered, high-temperature supercon-ductors ... whatremains of the mess left by the Exxon Valdez. The oil compo-nents are poisoning the otters.COPYRIGHT 2004 SCIENTIFIC AMERICAN, INC.www.sciam.com SCIENTIFIC AMERICAN 31with a dilemma: remove the ... credit card informationto 1-2 1 2-3 5 5-0 408 or make check payable to Scientific American, and mail your order to: Scientific American P.O. Box 1006 7Des Moines, IA 5034 0-0 067 1-9 copies $10.95(US) for...
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scientific american - 1995 05 - what found the top quark
... inhibitcandor when they are posed the ques-tion, ÒHow big is the diÝerence?Ó (Fur-ther, the work has not yet been peer-re-viewed or published, so the team re-mains quite cautious about the details.)Essentially ... DNA, the ruthenium-ribose combination revealedsomething extraordinary. The researchers examined the electri-cal properties of short lengths of dou-ble-helix DNA in which there was aruthenium ... small and medi-um-size businesses.Until the early 1990s, the World Bankignored the economic signiÞcance ofthese events or dismissed them as irrel-evant. At the same time, however, the historical...
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scientific american - 1997 10 - special issue - the future of transportation
... Copyright 1997 Scientific American, Inc.News and Analysis32 Scientific American October 1997 So last summer the group experiment-ed with the two structures, first oncomputer models, then on the real ... Bal-asubramanian. Last year, while chattingin the car on the way home from a con-ference, Regan suggested that two pro-teins being studied in the lab might justlend themselves to the mod-ern-day ... and Analysis52 Scientific American October 1997 CYBER VIEWMaster of Your DomainDAVID SUTER54 Scientific American October 1997 When the first issue of Scien-tific American hit the streets on...
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scientific american - 1997 12 - building the biggest
... Within the U.S. there is a wide variation in the status of fish,with the southern half of the country having far more imper-iled species than the northern half; the large map belowshows the number ... which they originally resid-ed. Instead they flow rather freely be-tween the atoms and are said to be de-localized. But they stay in or around the cluster because they are attracted to the now ... mega-hertz. By analyzing the peaks and val-leys and how they change as the fre-quency rises, Sinha’s software calculates the density of the hidden material, the speed of sound through it and the...
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scientific american - 2001 05 - get the idea (tomorrow's web will)
... Biológica of Doñana-CSIC. At night, the animals leave the safety of the scrubs tohunt on the open lands and find themselves at the mercy of hounds unleashed by the poach-ers during their nocturnal ... badgersbelonged to the five territories in Coto delRey; the others resided within the core of the park, Reserve Biológica. Of the tagged bad-gers, the team recorded 13 deaths, attribut-able mainly to the ... magnitude of the P-T extinction, the impact would have had tobe far larger than the K-T impact.”Becker points out that if an object the sizeof the K-T impactor hit the deep ocean ratherthan...
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scientific american - 1993 01 - the turbulent birth of the milky way
... CELSIUS)4,9 005, 150 4,650 4,40012-BILLION -YEAR- OLD AGE TRACK15-BILLION -YEAR- OLD AGE TRACKNGC 288NGC 362Copyright 1992 Scientific American, Inc.means that within the halo the only re-maining main-sequence ... declines as the reefs get farther awayfrom two centersÑone in the Indo-Pa-ciÞc and the other in the Caribbean. The outlines of a map marking plum-meting diversity coincide with the con-tours ... ones.Determining the relative ages of the halo and disk reveals much about the sequence of the formation of the gal-axy. On the other hand, it leaves open the question of how old the entire gal-axy actually...
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