scientific american - 2001 05 - get the idea (tomorrow''s web will)

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 ... con-firmed there is little reason to get too excited,”says paleontologist Douglas H. Erwin of the Smithsonian Institution. The most reliabletracers of the K-T impact (other than the sus-pected...

scientific american - 2001 03 - sculpting the earth from inside out

... MoleculeOXYGENCopyright 2001 Scientific American, Inc.Scientiﬁc American March 2001 19www.sciam.comNews & AnalysisRENO, NEV. The Chicxulub Cra-ter, sprawled across the Gulf ofMexico and the Yucatán Penin-sula, ... an itch. Examininganesthetized cats, theytracked the response ofthese neurons when itch-inducing histamine was ap-plied to the skin. The discov-ery, reported in the JanuaryNature Neuroscience, ... COLLINSCopyright 2001 Scientific American, Inc.Scientiﬁc American March 2001 25www.sciam.comBy the NumbersAt the dawn of the 20th century, suburbia was a dream in-spired by revulsion to the poverty...

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scientific american - 2001 10 - beyond the zone

... produce therapeutic pro-teins. McCormick thinks that the single-chain anti-bodies can be adapted easily to one-size-ﬁts-all thera-pies, perhaps against cancers of the pancreas, colon andother ... Copyright 2001 Scientific American, Inc.26 SCIENTIFIC AMERICAN OCTOBER 2001 InnovationsAnother unusual feature of NHL is that the antigenis actually an antibody. So a single-chain antibody vac-cine ... inputto the region by other neurons and to signalsof the local neurons interacting among them-selves. The other type, action potentials, re-ﬂects the characteristic spikes, or pulses, emit-ted...

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scientific american - 2002 05 - a fire within - inflammation's link to heart attacks

... havebeen found there, some in deepbogs, one in a cave, others scatteredabout. How they came there no-body can tell. They are of great an-tiquity. They have inscriptions onthem in the ancient ... beta-amyloid areable to cross the blood-brain barrier. Then the antibody forms a complex with beta-amyloid that triggers microglia—supportcells in the brain—to destroy the plaques. The problem ... according to the U.S. Ge-ological Survey. Only about 130 bighorns ex-ist in the state, says the New Mexico Depart-ment of Game and Fish (NMDGF), whichsince the mid-1990s has tracked sheep popu-lations...

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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 ... development.Ion-beam advocates pointout the biases of their oppo-nents. The current budgetgave $15 million to IBM todevelop an x-ray lithographycomponent. That project re-ceived backing in the budgetfrom ... 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...

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...

scientific american - 1997 05 - the 100 - year weather forecast

... 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 ... 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 association for the next year ... of other males.Male lions display their greatest ca-pacity for teamwork while ousting in-vaders the situation that presents the greatest threat to their common self-in-terest. At night the...

scientific american - 2001 06 - the paradox of the sun's hot corona

... archaeologists telllayers apart by playing a game of which-stars-are-not-like -the- others. The sun and mostother stars swirl around the galactic centerwithin a thin circular disk. Nearly a ... terrorism. The McVeigh group andother organized, overtly ideological extrem-ists—whether right-wing, left-wing, anti-Mus-lim, pro-Muslim, anti-Castro, Puerto Ricannationalist, eco-terrorist, ... makes peo-ple ask more questions.” —Kate WongNEW ENTRY into the hominid ranks30 SCIENTIFIC AMERICAN JUNE 2001 Copyright 2001 Scientific American, Inc.32 SCIENTIFIC AMERICAN JUNE 2001 newsSCAN■...

scientific american - 2001 12 - india, pakistan and the bomb

... Copyright 2001 Scientific American, Inc.Copyright 2001 Scientific American, Inc.orLifeBy Rakesh K. Jain and Peter F. CarmelietCopyright 2001 Scientific American, Inc.Copyright 2001 Scientific American, ... Scientific American, Inc.36 SCIENTIFIC AMERICAN DECEMBER 2001 BETTMANN/CORBISProﬁleof the most-talked-about environmental issues of the 20th century. The year before her 1986 walk in the cold, Sol-omon ... earlier.december 2001 SCIENTIFIC AMERICAN Volume 285 Number 638 Controlling capillary growthwww.sciam.com SCIENTIFIC AMERICAN 5Copyright 2001 Scientific American, Inc.Copyright 2001 Scientific American, ...

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 ... smooth-ly. Therefore, researchers have reexam-ined the reasoning that led them to infera singularity. One of the assumptions—that relativ-ity theory is always valid—is question-56 SCIENTIFIC...

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