These changes separate the reptiles from the amphibians. #1, the evolution of stronger, more effective jaw mechanisms, is the subject of this lecture and one topic in last week’s lab. The other ...

Our research considers how living and extinct animal skeletons function. We study why skeletons are shaped in a particular ... Origin of mammals Most studies of mammalian origins have focused on ...

But the timing of this switch from jaw to ear has been difficult to pin down, reports Science News. Jin Meng at the American Museum of Natural History and his colleagues discovered well-preserved ...