When you buy through links on our articles, Future and its syndication partners may earn a commission. The broad-shelled river turtle (Chelodina expansa) falls into a group known as side-neck turtles.

Shell integration typically involves 50 to 60 individual bones fusing into a permanent structural cage. The carapace creates a mechanical constraint that prevents the chest from expanding during ...

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 ...

The turtle neck retraction requires distinctive cervical features. Turtles are classified into two main categories, depending on whether they retract their heads by pulling them straight backwards, ...

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 ...