Eoraptor, an early dinosaur that first appeared 228 million years ago, grabs lunch. Eoraptor was a primitive three-foot-long theropod and likely feasted on a variety of small prey, including lizards, bugs, and worms. Here it has captured a mammal-like cynodont dubbed Probelesodon. In the background is a herd of the herbivorous dicynodont Ischigualastia. Cynodonts and dicynodonts predate dinosaurs and may be an evolutionary link between reptiles and mammals.