Following is a transcript of the video. Narrator: From blistering hot deserts to deep blue oceans, from frozen ponds to swampy wetlands, animal species have adapted and evolved in unique ways. Let's ...

Turtle shells evolved over the course of 300 million years, but self-defense wasn't the initial driver, researchers think. When you purchase through links on our site, we may earn an affiliate ...

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 ...