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ZoomDinosaurs.com Dinosaur News |
October 30, 1998 |
New chemical evidence from Denmark and Spain lends further supports to the Alvarez Asteroid Theory. This theory posits that a tremendous collision between the Earth and an asteroid or comet led to great climactic changes on Earth and to an enormous mass extinction about 65 million years ago. This catastrophic event killed off the dinosaurs, ammonites, and many other animal and plant groups.
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