Grisons, 241 million years ago ... Externally, Eusaurosphargis dalsassoi looks very similar to girdled lizards (Cordylidae), a group of small, scaled reptiles (Lepidosauria) ...

Meet the greater grison, a very cool member of the weasel family that you’ve almost definitely never heard of. The weasel family is well represented in Costa Rica. We’ve previously discussed the tayra ...