Sinornithosaurus, a feathered dinosaur, is believed to have been venomous, possibly using grooved teeth and a venom-delivery system similar to modern-day snakes. elaborate
Therizinosaurus's claws were so long, some were nearly three feet (a meter) in length—longer than a human arm! elaborate
Velociraptors were only about the size of a large chicken. elaborate
Cryolophosaurus's head crest wasn't upright like other dinosaurs with crests; it was more of a flat, forward-curving "Elvis" style. elaborate
Stegosaurus's brain was about the size of a walnut. elaborate
Apatosaurus's neck wasn't as flexible as often depicted; it likely couldn't reach very high or bend very far. elaborate