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Science Sharks not 'living fossils,' non-living fossil reveals

A 325-million-year-old shark fossil indicates that sharks have evolved quite a bit from their bony ancestors, challenging the perception that sharks are primitive creatures. 

By Tanya LewisLiveScience Staff Writer / April 16, 2014

AMNH/F. Ippolito

Sharks are usually thought of as primitive creatures, sometimes called "living fossils." But a new study of a 325-million-year-old shark fossil — the most complete of its kind — suggests modern sharks have evolved significantly from their bony ancestors.