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Shark Files: Ancient 'Supershark' Unearthed in Texas

The mega shark lived 300 million years ago and would have made today's great whites look like shrimps.

October 19, 2015
9:00 AM EDT
Shown is a well-preserved fossil of a 300-million-year-old shark from New Mexico. The new "Texas supershark" fossils (not pictured) are less complete, but suggest the supershark was even larger than the New Mexican shark. | John-Paul Hodnett