Tuesday, February 3, 2009

Edward Hopper Night Windows

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Massive asteroid impact: Asteroids and comets crash into our planet all the time, with varying degrees of damage. The last big one was 100 years ago in Siberia, but in such a remote area that no one died.
Yet scientists keep finding new evidence of medium-sized impacts that caused at least regional devastation — near New York species vanished.
It would take an asteroid the size of a small planet to really snuff out life on Earth.
Something very much like that seems to have happened harbor around 300 B.C., in eastern Canada about 11,000 B.C., the famous Meteor Crater in Arizona 50,000 years ago.Much larger asteroids have been tied to mass die-offs in biological history — the end of the dinosaurs 65 million years ago, and the even more devastating Permian-Triassic extinction event 251 million years ago in which some 80 percent of animal

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