Article: Extinction wars. (battle over cause of dinosaurs' demise)

With all the paleontologists looking up to the stars for an explanation of what caused mass extinctions of life on our planet, and with all the astrophysicists looking at the rocks below their feet for clues to comet showers or asteroids that might have bombarded the earth, it's a wonder that more scientists aren't complaining of neckaches.

But if anyone is getting a neckache it's probably the audience of the Great Extinctions Debate. Scientists and journalists who attended a special session in San Francisco at the recent meeting of the American Geophysical Union were treated to a Ping-Pong match of sorts. Proponents of the impact theory, which holds that an ...

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