Posthumous Paper by Gene Shoemaker Details Evidence of Comet Shower That Pummeled Earth 36 Million Years Ago

Geochemical evidence from a rock quarry in northern Italy indicates that a shower of comets hit Earth about 36 million years ago.

Gamma-ray Burst Found To Be Most Energetic Event in Universe

A team of astronomers from the California Institute of Technology announced today that a recently detected cosmic gamma-ray burst was as bright as the rest of the universe, releasing a hundred times more energy than previously theorized.

Geophysicists model the Cretaceous motions of Australia

The theory of plate tectonics says that Earth's crust has moved horizontally by thousands of miles over millions of years. For visual evidence, one need look no further than a map showing how nicely South America and Africa fit together.

Neuroscientists locate area of brain responsible for 3-D vision

Researchers have found the brain circuitry that allows us to see the world in three dimensions even when one eye is closed.

Geologists find more evidence for an active fault beneath downtown and east Los Angeles

Geologists report new evidence for a fault beneath Los Angeles that could cause damaging earthquakes in the future.

Yucca Mountain Is Possibly More Seismically Active Than Once Believed, Geologists Discover

Recent geodetic measurements using Global Positioning System (GPS) satellites show that the Yucca Mountain area in southern Nevada is straining roughly 10 to 100 times faster than expected on the basis of the geologic history of the area. And for the moment at least, geologists are at a loss to explain the anomaly.

Physicists create first nanometer-scale mechanical charge detector

PASADENA—Wristwatch cellular phones and space probes the size of baseballs would certainly have some eager customers, but both are still the stuff of science fiction.

Nonetheless, physicists are making strides these days in the sort of miniaturization that could someday make tiny electromechanical devices a reality. One such milestone, the first nanometer-scale mechanical charge detector, is reported in the current issue of Nature.

Mars Global Surveyor already bringing in scientific payoff

Despite a 12-month delay in aerobraking into a circular orbit, the Mars Global Surveyor is already returning a wealth of data about the atmosphere and surface of the Red Planet.

Researchers develop new plastic recording material that can be used to see through tissue without X rays

Researchers have recently achieved a certain amount of success in using laser light to see through scattering media such as human tissue. The new technology could eventually have medical applications in situations where X rays are ineffective or downright dangerous. Researchers develop new plastic recording materialthat can be used to see through tissue without X rays February 1998 98

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