Dinosaur extinction event: New study posits theory about why mammals and freshwater animals survived asteroid or comet.

Why Did Mammals Survive Dinosaurs’ Extinction?

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July 30 2013 10:58 AM

Why Did Mammals Survive Dinosaurs’ Extinction? (VIDEO)

A new paper by William Lewis of the University of Colorado has strung together multiple lines of evidence to produce the first comprehensive theory of extinction survival.

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