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 ...

Teenage Mutant Ninja Turtles was created by comic artists and writers Kevin Eastman and Peter Laird, and their work was an over-the-top, hyper-violent caricature of superhero comics at the time.

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 ...