scientific american - 1995 11 - guardian cells in the brain

... data in 3-D. Guardian cells in the brain. Saving the worldÕs fisheries. JugglingÕs tricks exposed. Copyright 1995 Scientific American, Inc. T he Intergovernmental Panel on Climate Change, an international body ... belching up gas now and then—or whether they result from the sound bouncing back and forth along the path between the source and the receiving instrument....

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... of the original miner- als in the peridotite. Some minerals, such as clinopyroxene, melt more easi- ly than do others and hence rapidly de- crease in abundance during the melt- ing. Moreover, the ... 1994 Scientific American, Inc. Mayewski hopes better insight into the inconstant nature of the sun will enable researchers to determine whether the present, human-generated i...

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... American, Inc. M arvin MinskyÕs ideas about the mind mayÑor may notÑoÝer lasting insights. But they certain- ly reveal much about the mind of Min- sky. According to Minsky, the mind is not a uniÞed ... growth), they do so at the expense of labor in the high-wage coun- tries. They thereby increase income in- equality there. Most citizens are wage earners. In the U.S., 80 per...

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... 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 0111 110000000010101010000000010000 0111 1 0111 0BITSTREAM: UNINTENDED 5-BIT KEY (VALUE OF 0111 1=15) INTENDED 4-BIT KEY (VALUE OF 0111 =7) UNINTENDED 15-BIT DATA BYTE INTENDED 7-BIT DATA BYTES LAURIE ... oÛce, where the sound of the surf and the...

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... 1994 Copyright 1995 Scientific American, Inc.Copyright 1995 Scientific American, Inc. ing the strengths, or weights, of the links. Many researchers use these net- works to model brain function and, ... IN 1 BILLION 1 IN 100 MILLION 1 IN 10 MILLION 1 IN 1 MILLION 1 IN 100,000 1 IN 10,000 Odds of any- thing happen- ing to only one person in the world at any t...

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... fourth year. The game is the low-ranking males hide, and the females try to get to them. But the high-ranking males follow the females and try to keep them from mat- ing with the low-ranking males,Ó ... which of- ten intervene to control the price of their nationÕs cur- rency. In Mexico the central bank maintained the price of the peso within a narrow 36 SCIENTIFIC AM...

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... biological-control programs, which reunite exotic species with their natu- ral-born enemies, explains Gary Buck- ingham of the USDA. Buckingham leads the insect quarantine facility in Gaines- ville, ... slip of the tongue is really just that? The audience nonetheless seems fas- cinated by SteinÕs thesis, which is some- what darker than GoldsteinÕs. The les- son of nonlinear scienc...

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... during the next 10 to 20 minutes, taking into account the lat- est ßight plan, wind and weather data. 34 SCIENTIFIC AMERICAN December 1995 Free-for-All Flights The FAA plans a revolution in ... not stop rewind- ing as expected on reaching the begin- ning of the tape. As of this writing, the teamÕs best guess is that the recorder may be seriously limited in its capabi...

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... at the University of Liverpool, and other academics have ruffled a few well-groomed feathers in the staid linguis- tics community. Their gos- sip-grooming hypothesis as- serts that our big brains ... Lymphoma Since 1973 the incidence of non-Hodg- kin’s lymphoma has risen some 75 per- cent in the U.S., in large part because of the AIDS epidemic. Recent findings by the National...

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