A Jurassic graveyard in Patagonia, Argentina, holds more than 100 fossilized eggs and the bones of 80 Mussaurus patagonicus dinosaurs ranging in age from hatchling to adult. The trove of dinosaur remains suggests that these paleo-beasts lived in herds as early as 192 million years ago, a new study finds.
Jurassic graveyard reveals oldest evidence that dinosaurs traveled in herds
