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Where does the anthrax go?
Only 10,000 anthrax spores are needed to spur a lethal case, and a single
gram contains 100 billion of them. One letter to Senator Tom Daschle meant
three months of fumigations for the Senate Office Building. How
did the spores spread to the far corners of the building? Berkeley
Lab researchers have constructed a model that zeros in on the answer.
natural
selection in DNA
How many molecular changes does it take to turn a chimpanzee into a human
being? While the answer is still uncertain, it may not be long in coming.
Contrary to popular theory, researchers have found that Charles Darwin's
evolutionary engine, the process of natural selection, operates
on the molecular level as well as on individuals.
climate
change comes to California
Increasing greenhouse gases could bring a warmer, wetter climate or a cooler,
drier one. Either way, California
stands to get drenched in the winter and parched in the summer, according
to a new study by the California Water Resources Research and Applications
Center and the National Weather Service.
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