It hunted small land animals and freshwater fish ... but its large feet looked more like flippers than its ancestor's longer legs. It also used its tail for swimming. An artist's impression of Dorudon ...

Lesothosaurus had a small head with very large eyes, short front legs with grasping hands, and an elongated body and tail about three feet (one meter) long. Its jaws were lined with small ...

Troodon walked (and ran) on two long, hind legs. It probably ate small lizards, mammals, and invertebrates. The animal's rotatable forearms, which sported three-fingered hands, likely aided ...