scientific american - 1999 07 - molecules from space

... into women-belong-back-in-the-kitchen ar- guments. And popular how-to books such as Men Are from Mars, Women Are from Venus, with their tenuous ties to evolutionary biology and their over- simplifications ... down- loading music from the Internet in the May issue. News and Analysis Scientific American July 1999 41 CYBER VIEW On-Line U. DAVID SUTER Copyright 1999 Scientific Ame...

Ngày tải lên: 12/05/2014, 15:58

... Baltimore, is co-sponsoring a meeting on the resolution this Novem- ber. Kurt L. Schmoke, the mayor of Bal- timore, who has supported harm-reduc- tion policies, has pledged to sign the res- olution ... M.S. from Cornell Univer- sity and a Ph.D. in applied physics from the University of California, San Diego. Copyright 1993 Scientific American, Inc. evaluating dangers to the general wel...

Ngày tải lên: 12/05/2014, 14:49

... million Americans with us.” —Glenn Zorpette News and Analysis Scientific American April 1999 47 Copyright 199 9Scientific American, Inc. GEMINI: A NEW EYE OPENS ON THE HEAVENS Mapping the Shape of Space ENDLESS ... giant light-col- lecting machines in- clude another Mauna Kea resident, the Gemini North Obser- vatory, backed by the U.S. and six other na- tions, which is near- ing its...

Ngày tải lên: 12/05/2014, 15:56

... psychologists? COPYRIGHT 2002 SCIENTIFIC AMERICAN, INC. 26 SCIENTIFIC AMERICAN JULY 2002 NASA news SCAN I n space, no one can hear you scream—be- cause, in the case of the International Space Station (ISS), ... several col- laborators decided to try to speed up the dif- fusion rate of the larger molecules. They mod- ified a class of inherently reverse-selective polymers —so-called...

Ngày tải lên: 12/05/2014, 16:13

... Wash., con- Þrms that the worldÕs biggest environ- mental release occurred over decades at a site called Tomsk-7 in central Sibe- ria. Tomsk-7, whose existence was clas- 20 SCIENTIFIC AMERICAN ... SpeciÞcally, the debris originated from the immense event re- sponsible for the formation of the Imbri- um basin, a 1,300-kilometer-wide dent that corresponds to the man-in-the- moonÕs right e...

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... area of the vi- sual cortex that re- ceives signals most di- rectly from the retina. Awareness, the re- searchers contend, is much more likely to stem from V5 or other higher-level re- gions of ... necessary to compare products. What it often fails to do, how- ever, is to translate data-on-a-screen into the understanding-in-a-head need- ed to make a decision. Ultimately the economics of u...

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... diphtheria-tetanus-pertussis and mea- sles-mumps-rubella are required for public school ad- mission. The chicken pox vaccine may join the list. JOHN CHIASSON Gamma Liaison Copyright 1995 Scientific American, ... species. Copyright 1995 Scientific American, Inc. S ometime during the past few mil- lion years, our many great-grand- parents came down from the trees and started to walk on...

Ngày tải lên: 12/05/2014, 15:02

... 77 7-0 444. Scientific American- branded products avail- able. For free catalogue, write Scientific American Selections, P.O. Box 11314, Des Moines, IA 5034 0-1 314, or call (800) 77 7- 0444. E-mail: info@sciam.com Photocopying ... point out, com- puters are not the only medium com- peting to grab American eyeballs. Peo- ple are also subscribing to more pay-TV on cable stations, tun...

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... SIMONELLI EVERETT COLLECTION; 20TH-CENTURY FOX Copyright 1997 Scientific American, Inc. News and Analysis24 Scientific American July 1997 In Brief, continued from page 22 Fur-ensic Evidence In 1994 a ... 77 7-0 444. Scientific American- branded products available. For free catalogue, write Scientific American Selec- tions, P.O. Box 11314, Des Moines, IA 5034 0-1 314, or call (80...

Ngày tải lên: 12/05/2014, 15:28

... LABORATORY Copyright 1998 Scientific American, Inc. Soils at the landing site vary from the bright-red dust to darker-red and darker- gray material. Overall, the soils are low- er in silicon than ... America’s Cup from New Zealand in 2000 —looks on with a par- ticular intensity. For this former Olym- pic sailor, engineer and nine-time Amer- ica’s Cup participant, the race has al- ready...

Ngày tải lên: 12/05/2014, 15:38