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Anthrax genomes compared for terrorism clues
Investigators seeking clues to last fall's anthrax attack have analyzed the genome of the anthrax bacterium.
- Planetary Science
Hard bodies pair off
About one out of every eight asteroids traveling near Earth has a rocky companion.
- Archaeology
Openings to the Underworld
Archaeological finds indicate that ancient groups in Mexico and Central America, including the Maya, held beliefs about a sacred landscape that focused on natural and human-made caves as sites of important ritual activities and burials.
- 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.
