Many scientists have long suspected that the tiny bones in the middle ears of all modern-day mammals evolved from bones in ancient reptilian jaws, but direct evidence was lacking. Now, paleontologists have unearthed fossils that appear to show the transition.
Note: To comment, Science News subscribing members must now establish a separate login relationship with Disqus. Click the Disqus icon below, enter your e-mail and click “forgot password” to reset your password. You may also log into Disqus using Facebook, Twitter or Google.