From the Smithsonian Channel

The Surprising Reason Birds First Grew Feathers

Name: The Surprising Reason Birds First Grew Feathers
Uploaded: 2018-09-12
Duration: 151208
Description: When birds first grew feathers 150 million years ago, their function was not necessarily to help with flight.

When birds first grew feathers 150 million years ago, their function was not necessarily to help with flight.

Smithsonian magazine | 2:31