8,095 results
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Vitamin A calibrates a heart clock, 24-7
Scientists have discovered a molecular clock that keeps the circulatory system in sync with the rest of the body, and they show it's regulated by vitamin A.
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- Animals
Bat bites bird. . .in migration attacks
The largest bat in Europe may hunt down migrating birds.
- Earth
Avalanche!
Laboratory studies of how snow crystals change shape under fluctuating environmental conditions and computer analyses that match the patterns of past avalanches with detailed meteorological data are helping scientists uncover the secrets of avalanches.
- Anthropology
A Fair Share of the Pie
A cross-cultural project suggests that people everywhere divvy up food and make other economic deals based on social concepts of fairness, not individual self-interest.
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Endangered condors lay first eggs in wild
A U.S. Fish and Wildlife Service biologist has spied a trio of California condors, released to the wild from captive-breeding programs sometime over the past 6 years, attending a pair of eggs.
- Paleontology
Jumbled bones show birds on the menu
A fossilized pellet of partially digested bones of juvenile and baby birds provides the first evidence that birds served as food for predators.
- Chemistry
For a better smile, have some wasabi
Chemicals in the Japanese condiment wasabi could help prevent tooth decay.
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- Math
Knot Possible
Knot theorists are getting closer to their goal of developing practical procedures for distinguishing knotted curves from unknotted ones.
- Paleontology
Turn Your Head and Roar
The analysis of fossils that preserve evidence of diseases that appear to be similar or identical to afflictions that strike modern animals, including humans, could help scientists better grasp the causes and courses of today's ailments.
- Earth
Snowpack chemistry can deplete ozone
Pollutants trapped in Arctic snow can be reactivated by sunlight when the sun returns to high latitudes in the spring, leading to ozone depletion in the snowpack and at low altitudes.
