Archeopteryx is one of the most important fossils in the history of evolution

as many ceratopsians display complex social behaviors

Dilophosaurus fossils have been found to have teeth marks from other theropod dinosaurs

Brontornis (B

Eohippus angustidens Variant:Primed Archeopteryx is one of theEohippus angustidens : The horse's first step in the history of evolution Long before horses galloped across the world's open plains, their lineage took its first tentative steps in the dense forests of the early Eocene. Among them, one of the oldest and most representative was Eohippus angustidens , a tiny creature that marks the starting point of one of the most extraordinary evolutionary stories in the animal kingdom: that of the horse. Eohippus ,