Saber-toothed cats — an umbrella term for a wide variety of felid species with massive, scimitar-like teeth — are some of the most terrifying prehistoric predators, carnivorousness incarnate.
But it turns out the teeth that give them their name and their fearsome reputation were also their greatest weakness.
The problem? While the oversized upper canines were optimal for delivering kill bites and tearing into flesh, they could break if the teeth met bone with force.
“Slicing and crushing are basically the two main things a carnivorous mammal’s teeth can do,” said Narimane Chatar, a postdoc at UC Berkeley studying carnivores. “But for saber-toothed animals, there’s a clear trade off. Those upper canines were extremely efficient but also break very easily.”
As experts on extant big cats are well aware, a hypercarnivore with broken or damaged fangs can struggle to take down their typical prey. That’s what often turns tigers, leopards and lions into man-eaters. (Interestingly, there are no documented accounts of man-hunting jaguars. Jaguar attacks on humans are exceedingly rare, and while they have killed humans, there’s no jaguar equivalent of the Chamapawat Tiger or the Leopard of Rudraprayag.)
During her research, Chatar found the skull and teeth of a saber-toothed cat in Berkeley’s archives and realized it was not the same species associated with saber-toothed cats in the Americas.
Although Smilodon and Homotherium are the most well-known species, “there was a crazy variety of saber-toothed cats,” Chatar said.
Her research has confirmed the prehistoric cat’s sword-like fangs were double-edged, literally and figuratively. Per UC Berkeley:
“In simulations, 3D-printed saber teeth from various species proved ideal at penetrating a gel with the consistency of flesh but fractured easily against simulated bone. In the former tests, Smilodon came out on top. In the latter, Smilodon fared the worst.“
Smilodon lived in the Americas and went extinct about 8,200 years ago. Los Angeles’ La Brea Tar Pits have yielded a number of preserved skeletal remains, making Smilodon and its three sub-species among the best-known prehistoric felids.
Smilodon and Megantereon images via Wikimedia Commons.
Pain In The Bud 