Scientists believe that at the end of the Mesozoic Era, a large comet struck Earth. What was one major impact of the comet strike?

The resulting impact energy is equivalent to 4.4 billion megatons of TNT. That is about 44 times the estimated energy of the asteroid impact that killed the dinosaurs 65 million years ago. Such an energetic impact may completely sterilize Earth, resulting in the extinction of all life on the planet.

Explanation:

the fossil record provides evidence of a common ancestor to many species.

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