Live Science on MSN

Can a turtle tuck its head all the way inside its shell?

Turtle shells evolved over the course of 300 million years, but self-defense wasn't the initial driver, researchers think.
The Conversation

How did the turtle get its shell? Fossil discovery gives us a clue

Gareth Dyke does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond their ...