Brainstuff

It seems obvious that turtles' shells would have evolved to protect them from predators, but researchers have found that they probably first evolved to help turtles dig. Learn what that's all about in this classic episode of BrainStuff, based on this article: https://animals.howstuffworks.com/reptiles/real-reason-turtles-have-shells-hint-its-not-protection.htm Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.