|
|||||
|
|
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 |
|