Snake
The fossil of a primitive snake from the Lower Cretaceous has been found. It lived about 113 million years ago. It had rather small front and rear legs. Several other fossil snakes have been found with small rear legs, but this is the first one with all four legs. The snake, Tetrapodophis amplectus, lived on land and was adapted to burrowing. The researcher said there were "a lot of very advanced snake features, including its hooked teeth, flexible jaw and spine – and even snake-like scales. And there's the gut contents – it's swallowed another vertebrate. It was preying on other animals, which is a snake feature". The snake came from the Crato Formation in Brazil, and lay in a private collection for many years. It was re-discovered in a museum at Solnhofen, Bavaria.