News
- Planetary Science
Rocks on the ice
Pristine fragments of a meteorite that fell January 18 in the frozen Yukon and that remained frozen until they were delivered to a NASA laboratory may reveal much about the earliest days of the solar system.
- Anthropology
Lucy on the ground with knuckles
Some early human ancestors appear to have walked on all fours using their knuckles, much as chimpanzees do.
- Anthropology
Goat busters track domestication
People began to manage herds of wild goats at least 10,000 years ago in western Iran.
- Tech
Microdevice weds electronics, light fibers
By altering the chemical structures of dyelike molecules called chromophores, researchers have created tiny, low-voltage devices for converting electronic signals into light waves.
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Cooperative strangers turn a mutual profit
In social exchanges, monkeys and people often appear to act according to the principle that "one good turn deserves another."
- Tech
Coal: The cool fuel for future jets
To power faster supersonic jets, scientists are developing coal-derived fuels that can absorb heat without breaking down at high temperatures.
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How whales, dolphins, seals dive so deep
The blue whale, bottlenose dolphin, Weddell seal, and elephant seal cut diving energy costs 10 to 50 percent by simply gliding downward.
- Earth
Gasoline additive’s going, but far from gone
As the federal government proposes phasing out the gasoline additive MTBE, scientists explore ways to remove this potential carcinogen from drinking-water supplies that it has tainted throughout the nation.
- Health & Medicine
Tests may better detect prostate cancer
Two novel tests for prostate cancer may help physicians catch this disease earlier and with far fewer false alarms.
- Planetary Science
A Comet’s Long Tail Tickles Ulysses
Stretching more than half a billion kilometers, the ion tail that Comet Hyakutake flaunted when it passed near the sun in 1996 is the longest ever recorded and suggests that otherwise invisible comets could be detected by searching for their tails.
- Physics
Nanotubes get into gear for new roll
Atoms on the surface of carbon nanotubes appear to mesh when tubes roll across a graphite surface, making the tubes possible atomic-scale gears, which have been long-sought in nanotechnology.
- Physics
Devilish polygons speak of past stress
A new theory and a simple test with cornstarch and water may help explain the polygonal geometry of rock columns in the Devil's Postpile in California and elsewhere.
