scientific american - 2000 01 - we were not alone only we remain why

scientific american   -  2000 01  -  we were not alone  only we remain  why

scientific american - 2000 01 - we were not alone only we remain why

... cousins. Only we remain. Why? Our species had at least 15 cousins. Only we remain. Why? We Were Not Alone We Were Not Alone Copyright 1999 Scientific American, Inc. News and Analysis 32 Scientific American ... two Boe- ing 747s were flying toward each another along the same airway but sep- arated vertically by a safe and whole- some 2,000 feet. As the jets...
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scientific american   -  2000 09  -  muscles & genes  are star athletes born, not made

scientific american - 2000 09 - muscles & genes are star athletes born, not made

... faced with person- nel changes and the vagaries of funding. Keeping a lab’s Web server running and up-to-date is a long-term commitment. As opposed to the well-publicized ri- valry between the HGP ... of vol- unteers to perform an array of cognitive tasks while they were exposed to simu- lated cell-phone emissions from head- sets. The emissions had no apparent ef- fect on short- or long-ter...
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scientific american   -  1993 01  -  the turbulent birth of the milky way

scientific american - 1993 01 - the turbulent birth of the milky way

... 4,650 4,400 12-BILLION-YEAR- OLD AGE TRACK 15-BILLION-YEAR- OLD AGE TRACK NGC 288 NGC 362 Copyright 1992 Scientific American, Inc. means that within the halo the only re- maining main-sequence stars ... ßat-bot- tomed cumulus clouds moved west- ward on light trade winds. Calm seas were rarely disturbed by squalls sweep- ing into the northeastern Caribbean Sea from the Atlantic Ocean. T...
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scientific american   -  1994 01  -  searching for strange quark matter

scientific american - 1994 01 - searching for strange quark matter

... London 28 SCIENTIFIC AMERICAN January 1994 Copyright 1994 Scientific American, Inc. V ariously dry, wet or anywhere between, wetlands are by their nature protean. Such constant change makes wetlands ... developers while pro- tecting the ecological features of wet- lands. Fluctuating water levels and the sensitivity of wetlands to these chang- es as well as the dependence of wet- lands...
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scientific american   -  1995 01  -  warning  -  digital documents in danger

scientific american - 1995 01 - warning - digital documents in danger

... stream. $500.00 $100.00 $50.00 $100.00 $500.00 $400.00 $450.00 $350.00 DEPOSIT CHECK#314 DEPOSIT CHECK#315 4/5/94 4/26/94 4/27/94 11/3/94 011 111000000 0010 1010 1000000 0010 00 0011 1 1011 10BITSTREAM: UNINTENDED 5-BIT KEY (VALUE OF 011 11=15) INTENDED 4-BIT KEY (VALUE OF 011 1=7) UNINTENDED 15-BIT DATA BYTE INTENDED 7-BIT DATA BYTES LAURIE ... the ste- reoscope was invented. It was not...
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scientific american   -  1996 01  -  the diet - aging connection

scientific american - 1996 01 - the diet - aging connection

... looked up and wondered. Well, as of two weeks ago, we know.Ó ÑCorey S. Powell SCIENTIFIC AMERICAN January 1996 23 Copyright 1995 Scientific American, Inc. 24 SCIENTIFIC AMERICAN January 1996 C hecking ... The organism remains susceptible to a top- of-the-line antibiotic called vancomycin, but authorities fear that may not last. The American Society for Microbiolo- gy reported...
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scientific american   -  1997 01  -  parkinson's disease

scientific american - 1997 01 - parkinson's disease

... connec- tions between its members can be inferred. Why flowering trees suddenly proliferated in that period remains controver- sial. The 80 taxa of charcoal flowers unearthed here, in combi- nation ... PALSY” F o r e ! T r i c k s o f t u r b u l e n c e s t i l l d e f y s u p e r c o m p u t e r s Copyright 1996 Scientific American, Inc. mother bought him an Apple II com- puter and a 3...
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scientific american   -  1998 01  -  flying over the solar system

scientific american - 1998 01 - flying over the solar system

... therefore able to grow not only embryos with no head but also ones that were noth- ing but a head. The embryos were not kept alive beyond about three days, at which point an embryo has only precursors ... For one thing, car- bon and silicon do not mix well. “Car- bon’s not that happy in that lattice,” Sturm notes. To accommodate the un- easy union, researchers have had to re-...
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scientific american   -  1999 01  -  revolution in cosmology

scientific american - 1999 01 - revolution in cosmology

... real, why aren’t we un- dergoing a renaissance unparalleled in human history?” he demands, almost ir- ritably. “I mean, why aren’t we duplicat- ing the golden days of Athens or the Ital- ian ... They also noted the subjects’ other health behaviors, such as exer- cise patterns, smoking and drink- ing, and looked at how all those affected food choices. The al- most 3,000 subjects were...
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scientific american   -  2000 02  -  galileo finds fire and brimstone on jupiter's moon io

scientific american - 2000 02 - galileo finds fire and brimstone on jupiter's moon io

... traces. To answer that, chemist John T. Arm- strong of the National Institute of Stan- dards and Technology used spectral-an- alyzer software and a database contain- ing high-precision x-ray measurements to ... to- gether like a jigsaw puzzle to produce the 33.4-million-base-pair sequence. The report,in the December 2, 1999,Na- ture, also identified 11 gaps —short stretches of repetitious code...
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