Feathers are among the most complex cutaneous appendages in the animal kingdom. While their evolutionary origin has been ...

For over a century, astronomers have marveled at the beauty and complexity of spiral galaxies, which feature arms covered in ...

Scientists now believe that feathers didn’t just appear suddenly in birds. Instead, they evolved step by step from much ...

Inhibiting the sonic hedgehog (Shh) pathway strongly perturbs feather development in chickens by restricting feather bud ...