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 ...

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

Aquarist Brendan Gilloffo works with green sea turtle Nickel on husbandry behaviors during a training session at the Shedd Aquarium on June 8, 2023. Eileen T. Meslar/Chicago Tribune/TNS Some ...

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 ...