Dinosaur extinction is an unsolved mystery. This ancient fish may have swallowed some crucial evidence.

a large rocky landscape

But the findings are not without their fair share of critics.

A new set of fossils found in North Dakota could potentially give us our best pictures yet of the extinction event that wiped out the dinosaurs 66 million years ago.
via Popular Science "https://ift.tt/2FPcaXy"


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