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

In cartoons, when a turtle is spooked, it retreats into and closes up its shell. While used for comic effect, this imagery is based in fact — although not all turtles are capable of this protective ...

As a budding naturalist growing up in the concrete-heavy environs of Boston, I would regularly thumb through my family’s collection of nature books and daydream about the creatures within. One species ...