What may have looked like a cross between a platypus and a beaverlike rodent and lived around 120 million years ago? Dongoconodon platycauda, a newly discovered fossil mammal from northeastern China. Beyond its unusual features, such as evidence of webbed paddling feet and a rudderlike tail, th...
Source: [Phys.org](https://phys.org/news/2026-10-ancient-mammal-fossil-evolutionary-teeth.html)