Ancient plant-eater with a twisted jaw and sideways-facing teeth was a 'living fossil' in its own time

Phys.org

March 4, 2026

In a dry riverbed in Brazil, in a dense forest near the Amazon, a team of paleontologists found a fossilized jawbone from an ancient animal. Over the course of their fieldwork, they found eight similar bones, each around six inches long—but no other bones that they could confidently use to complete a skeleton for one of these mystery animals.