Locked away for millions of years in a hard green marl on the bottom of a Choctaw County stream, the tooth was finally liberated from the limestone-like rock by a spring flood. The rushing creek ...
These three teeth depict more than 50 million years of megatooth shark evolution. Megalodon's earliest ancestor, Otodus obliquus, from left, had smooth-edged teeth with a thick root and lateral ...
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