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Animals

300-Million-Year-Old Shark Was a Cannibal

Baby teeth in a fecal sample confirm an ancient marine predator ate the young of its own kind.

August 11, 2016
4:00 PM EDT
Shown is a sample of Orthacanthus feces, with a black box indicating the tooth of a juvenile Orthacanthus. Credit: Aodhán Ó Gogáin (Trinity College Dublin)