Saber-toothed cat fossils provide evidence of canines able to puncture a skull
(PHYSorg.com Archaeology & Fossils)

A team of researchers with members affiliated with several institutions in Argentina has found evidence that suggests the canine teeth of the saber-toothed cat were strong enough to puncture the skulls of other members of the same species. In their paper published in the journal Comptes Rendus Palevol, the group describes their study of saber-toothed cat fossils and what they learned from them.