It’s a small, weathered tooth—nothing flashy at first glance. But the scientists who found it buried in Brazil’s Tremembé Formation know better. This single canine belonged to a predator that once ...

The right lower canine of a large proborhyaenid sparassodont from the Tremembé Formation, Brazil. Scale bars – 5 mm in (A-E) and 20 mm in (H). Credit: Rangel et al It’s a small, weathered ...