A new study reported in the journal PLoS ONE shows that the teeth of the fearsome saber-toothed cat (Smilodon fatalis) fully emerged later in life than those of modern big cats, but grew at a rate about double that of their living relatives. The saber-toothed cat (Smilodon sp.). Image credit: Charles R. Knight. The saber-toothed cat lived in the Americas until going extinct about 10,000 years ago. The cats are famous for their protruding canines,...
