August 15, 1998 | Volume 154 | Number 7Cover: The rooms and corridors of this laboratory could fit in the palm of your hand. Scientists designed the glass microchip -- shown in this computer-generated image -- to do chemistry. It uses electrodes to direct fluid (red arrow) through its channels and reaction chambers. Such microchips could speed diagnostic tests and drug development. (Orchid Biocomputer)
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News of the Week:Satellites Misread Global Temperatures
A correction to satellite temperature measurements shows that Earths atmosphere has not been cooling in recent decades; the revision reduces the discrepancy between atmospheric readings and increasing ground temperatures.
Paper wasps that take over other females' nests may be playing out a novel sit-and-wait reproductive strategy instead of building or tending their own nests.
Non-estrogen morning-after pill works best
A 14-country study by the World Health Organization indicates that a pill without estrogen but with a larger dose of progestin prevents conception better than a combined estrogen-progestin pill and causes fewer side effects.
Birth zone shrinks for top cosmic rays
The most potent cosmic rays hit the Earth with so much energy that it is unlikely they have come from far away in the universe.
Grafted muscle cells aid damaged hearts
Researchers boosted pumping efficiency in damaged rabbit hearts by introducing leg muscle cells.
Antidepressant helps smokers to kick ash
The drug bupropion, which enhances the activity of the chemical messenger dopamine, shows promise in aiding cigarette smokers to give up their habit.
Cracking Kepler's sphere-packing problem
Mathematicians have proved Kepler's assertion that the pattern of neatly stacked oranges in a grocery face-centered cubic packing of identical spheres fills space more efficiently than any other arrangement.
Laser beam can pop out single cells
A new laser tool allows researchers to rapidly isolate and lift away individual cells for analysis.
BiologyNew hunting trick explains bird luck
Sense organs on its bill that monitor water movement help a type of sandpiper called a red knot find mollusks hidden deep in the sand.
Oh, not those jet-ski things again!
Nesting terns appear to be disturbed more by personal watercraft than by motorboats.
Aspirin works on plants, too
Aspirin shuts down a plant's response to injury by the same chemical reaction, but blocking a different enzyme, as in its action in animals.
The natural protein called p21 plays a key role in limiting the recurrence of tumors in bladder cancer patients.
FDA clears thalidomide for leprosy use
Banned in the early 1960s because it causes birth defects, thalidomide can now be used for treating leprosy and is being tested for other applications.
Putting the squeeze in superconductors
A superconductor known as 214 undergoes a remarkable leap in maximum superconducting temperature when grown as a strained crystal.
Uncontainable boron floats into view
Hot, corrosive liquid boron yields secrets of its complex atomic structure while levitated on argon gas.
The Incredible Shrinking Laboratory
Chemistry labs etched on silicon, glass, and plastic surfaces promise to speed chemical synthesis, diagnostic tests, and gene sequencing.
Microchips may revolutionize chemistry as they did computers
Dialing up an Embryo
The molecules that detect odors may also guide embryonic development.
Are olfactory receptors digits in a developmental code?
Another Face of Entropy
Scientists find entropy to be a powerful agent and possibly a practical tool for creating order in microscopic suspensions and biological cells.
Particles self-organize to make room for randomness
Letters: A Selection from Letters to the Editor
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