News
- Physics
Tiny tungsten beams lord over light
By filtering radiated heat, a novel microstructure of crisscrossed tungsten beams promises to improve the efficiency of light bulbs and of heat-to-electricity conversion devices.
By Peter Weiss - Health & Medicine
Freeing up the mouse genome
Scientists have assembled the DNA sequences from a strain of the common lab mouse and made the draft genome available for free over the Internet.
By John Travis -
Would-be brain boosters need data lift
Research has yet to confirm that the herb Ginkgo biloba and other nonprescription nutrients enhance memory and intellect.
By Bruce Bower - Astronomy
More evidence for a revved-up universe
By studying the clustering pattern of galaxies, astronomers have obtained additional evidence that cosmic expansion is accelerating.
By Ron Cowen - Animals
Gator Feelings: Tough faces, more sensitive than ours
Alligator and crocodile faces carry pressure receptors so responsive that they can detect ripples on the water's surface from a single falling drop.
By Susan Milius -
Anthrax genomes compared for terrorism clues
Investigators seeking clues to last fall's anthrax attack have analyzed the genome of the anthrax bacterium.
By John Travis - Planetary Science
Hard bodies pair off
About one out of every eight asteroids traveling near Earth has a rocky companion.
By Ron Cowen - Health & Medicine
D-fending the Colon: Bile component triggers vitamin D receptor
The protein that enables cells to respond to vitamin D also helps the gastrointestinal tract protect itself from an especially dangerous acid in bile.
By John Travis - Tech
Live Tour: Joystick journeys reveal tumor interiors
A new holographic technique may someday enable doctors to skip certain biopsies and choose instead to take video excursions inside suspicious growths in skin or internal body linings.
By Peter Weiss - Health & Medicine
Wholesome Grains: Insulin effects may explain healthful diet
Overweight people who eat whole grains rather than refined ones appear better equipped to manage their blood-sugar concentrations with minimal production of the hormone insulin, which could help explain why a diet rich in whole grains appears to guard against type II diabetes and heart disease.
By Ben Harder - Earth
Shelter from Space Storms: Energy rebounds from Earth
NASA satellite observations show that Earth's outer atmosphere interacts dramatically with the solar wind and shields the planet from it.
- Health & Medicine
Amyloid Buster? New drug hinders Alzheimer’s protein
By disabling a dementia-linked protein, a synthetic drug is showing a tantalizing capacity to interfere with the formation of waxy amyloid deposits like those that accumulate in the brains of people with Alzheimer's disease.
By Nathan Seppa