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

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

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

... Growth CORONA JUNE 2001 $4.95WWW.SCIAM.COMSIGN LANGUAGE AND THE BRAIN■HOW DO FLIES FLY? (SEE P. 48) The Paradox of the Sun’s Hot Copyright 2001 Scientific American, Inc.Copyright 2001 Scientific ... absolutely firmin their convictions. And if you say to either one of them they’rewrong, then they start tuning you out.” So McNutt tries to make the 15-year-olds aware of the other’s position ... to one of the most beau-tiful spectacles in all of nature: a total eclipse of the sun. The two of us were among them. One of us (Phillips)watched from Bulgaria as the glaring disk of the sunwas...
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scientific american   -  2001 12  -  india, pakistan and the bomb

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

... Scientific American, Inc.36 SCIENTIFIC AMERICAN DECEMBER 2001 BETTMANN/CORBISProfile of the most-talked-about environmental issues of the 20th century. The year before her 1986 walk in the cold, Sol-omon ... suf-fered a triple-decker weather disaster while crossing the Ross Ice Shelf, the last leg of their return journeyfrom the pole. That 400-mile crossing should havebeen the easiest part of their ... 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, ...
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scientific american   -  2003 04  -  50 years of the double helix

scientific american - 2003 04 - 50 years of the double helix

... dis-covered property of the neutrinos themselves.Ironically, the confirmation of our best theory of the sun ex-poses the first flaw in the Standard Model of particle physics—our best theory of ... The average of their answers is the ba-sis of the subjective threshold calculation, in-dicated by the dark blue line. On average the respondents named a figure 76 percent high-er than the of cial ... conduct-ed in the mid-1960s by Raymond Davis, Jr., of the University of Pennsylvania and his co-workers, was intended to be a tri-umphant confirmation of the fusion theory of solar power gen-eration...
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scientific american   -  1993 06  -  tuning in the radio signals of ancient galaxies

scientific american - 1993 06 - tuning in the radio signals of ancient galaxies

... Furthermore, if the hot end of the rod is then plunged into ice,a wave of cooling will follow the wave of heat down the length of the metal.In the same way, temperature ßuctua-tions at the ... gam-ma-chain gene were causing the im-munodeficiency. With the further assis-tance of Howard M. Rosenblatt of the Baylor College of Medicine and Alexan-dra H. Filipovich of the University of Minnesota, ... was“appalled by the paralysis and the politi-cal divisions and the fact that the mon-ey’s being blown” on Superfund. Frank Popo›, chairman of the Dow ChemicalCompany and of the board of the Chem-ical...
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scientific american   -  2000 06  -  the birth of molecular electronics

scientific american - 2000 06 - the birth of molecular electronics

... Africa. The map shows data on the prevalence of wheezing—a com-monly used indicator of asthma—for 1 3- and 14-year-olds, tak-en from one of the largest epidemiological studies, the Interna-tional ... FFlloooorr??MolecularElectronics The Birth of Copyright 2000 Scientific American, Inc.Scientific American June 2000 37ProfileProfileserved specimen of one of the earliest di-nosaurs ever discovered—a 228-million-year-old ... pain—drugs in the same class asibuprofen and aspirin. The McGeers, hus-band-and-wife neuroscientists at the Uni-versity of British Columbia, arebetting on nonsteroidal anti-in-flammatories as the first...
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scientific american   -  1993 03  -  black holes and the centrifugal force paradox

scientific american - 1993 03 - black holes and the centrifugal force paradox

... together can determine the thick-ness of the ice and the nature of the underlying rock. With Robin E. Bell of the Lamont-Doherty Geological Obser-vatory, the co-leader of ALICE, Blanken-ship ... unsound. Thus, the largest block of problem states is not in the Òrust beltÓ of the North, nor in the high-traÛc re-gions of the Northeast and Southwest,but rather in the southeastern U.S. ... hole. The stationis a circular tube centered exactly on the path of the circular ray so that the axis of the tube and the path of the ray coincide. The astronauts know that the axis of the tube...
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scientific american   -  1994 06  -  was there a race to the moon

scientific american - 1994 06 - was there a race to the moon

... angularmomenta. The eccentricity of the cor-responding elliptical orbit determines the spread. The square of the magni-tude of the wave function gives the probability for Þnding the electron at ... conditions. At the be-ginning of the race, the runners line upat the startÑthat is, they are well local-ized. Each one runs in one of the quan-tized Bohr orbits. During the initial laps, the runners ... for the N-1 rock-et and a two-cosmonaut version of the new Soyuz spacecraft being designedby the Korolev bureau.Although the Þrst few test ßights of the UR-500 booster in 1966 were suc-cessful,...
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scientific american   -  1995 06  -  the world's strongest magnets

scientific american - 1995 06 - the world's strongest magnets

... thatthey were the few Cretaceous survivors. The foundation of this theory beganto shake in 1981, when fossils of Òop-posite birdsÓ were unearthed in Chinaand, then, all over the Northern Hemi-sphere. ... Final cut, the size of the dress-ing room, or the hors dÕoeuvres avail-able for on-set snacking the point of power in Hollywood is to use it to exer-cise control. Yet the point of interactiveentertainment ... of the issues raised by cura-tors was artistic integrity. They did notwant future art lovers changing the col-ors of a Holbein to match the decor of their living rooms; they wanted to pre-serve...
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scientific american   -  1996 06  -  the space station

scientific american - 1996 06 - the space station

... microorganisms.If the impact of urban agriculture con-tinues to broaden, the notion of the gar-den city the turn -of -the- century dream of urban centers lined with trees and or-namental plants—may ... condi-tion. Blood vessels connected one cham-ber in the fetus’s heart to the coronaryarteries that feed the heart, resulting ina backwash of blood flooding the arter-ies. Using a state -of -the- art ... itdiverts them from the real sources of advantage in the database world. The first and most important of these is the ability to gather new information.Over the long term, the greatest im-pact of computers...
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scientific american   -  1997 06  -  the microchip that rewires itself

scientific american - 1997 06 - the microchip that rewires itself

... 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 ... or their distribution. In the Northeast, with its meadows and for-ests, they are abundant, but in the Mid-west, with its vast expanses of mono-culture crops, they are scarce. MarionEllis of ... variety of other diseases. The Centers for Disease Control and Preven-tion estimates that 420,000 Americans died of a smoking-re-lated disease in 1990 and that, of these, 28 percent died of lung...
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