Paleontologists have unearthed a 20-million-year-old fossilized skeleton of a species of the dugongid sirenian mammal Culebratherium with shark and crocodylian bite marks in northwestern Venezuela. The most conspicuous bite marks correspond to deep tooth impacts with dragging effect, concentrated on the animal’s snout. The researchers interpret these as the result of active predation because of the similarity with those produced when a crocodylian...