TINY DINO BONES In southwestern China, researchers discovered the oldest known dinosaur embryos, finding more than 200 bones of unhatched dinosaurs (a thigh bone shown) that date to nearly 200 million years ago. Dianne ScottThis series of cross sections shows how an embryonic dinosaur’s thigh bone changes as it develops.
Log in
Subscribers, enter your e-mail address for full access to the Science News archives and digital editions.
