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

Add Yahoo as a preferred source to see more of our stories on Google. Shell integration typically involves 50 to 60 individual bones fusing into a permanent structural cage. The carapace creates a ...

Discover why Kemp’s ridley sea turtles matter, the threats they face, and how WWF is helping protect this endangered species.

Add Yahoo as a preferred source to see more of our stories on Google. It's a long-held idea that turtles can tuck their heads into their shells when threatened. But is it true? And is this protective ...