It's long been thought that a giant asteroid, which broke up long ago in the main asteroid belt between Mars and Jupiter, eventually made its way to Earth and led to the extinction of the dinosaurs. New studies say that the dinosaurs may have been facing extinction before the asteroid strike, and that mammals were already on the rise. Image credit: NASA/JPL-Caltech

Mammals Were Already Flourishing When The Axe Fell On The Dinosaurs

Mammals were well on their way to dominance long before an asteroid strike was the death-blow for dinosaurs.

Universe Today
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