About this time every year, female turtles drag themselves out the lake in order to lay their eggs. They seem to have no fear.
If a turtle survives for five or six years, its shell has become rock hard.
When danger threatens, the turtle merely retracts its head, tail and four stubby legs.
The top and bottom of the shell fit so perfectly that the turtle is safe from any enemy (except, perhaps, a moving vehicle).
Though a shell offers support and protection, it also presents a few problems. For one thing, there is no such thing as a graceful turtle.