Evolution is a master recycler. It often uses old structures (or ancient genes) for new jobs. The mammalian ear is a perfect example. Over the eons, the jawbones of our fish ancestors became three ...

As a dog owner, you want your best friend to be stress-free and relaxed, not rubbing his ears on the living room rug, shaking his head or pawing his ears to stop the itching. You know he is ...

The outer ear is unique to mammals, but its evolutionary origin has remained a mystery. According to a new study published in Nature from the USC Stem Cell lab of Gage Crump, this intricate coil of ...