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Mr. Beast's teeth are noticeably different in recent videos — these are the reigning theories
Mr. Beast's teeth have long been a topic in his YouTube comments, and fans some fans noticed that they've changed.
A surprising fossil find shows that some mosasaurs lived in ancient rivers as oceans changed near the end of the Cretaceous.
It is enamel. Like hair and nails, this hard substance is made by epithelial cells. Once it was thought to be as inert as rock; now it is known to exchange its substance with the body fluids ...
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