In the winter, turtles burry themselves in the mud at the bottom and go through a process called brumation, where they breathe through their butts.

The sex of some turtle species is determined by the temperature of the nest, with warmer temperatures producing females and cooler temperatures producing males.

Sea turtles "cry" because they have glands near their eyes that secrete excess salt.

Turtles hiss, grunt, and even make other sounds to communicate.

Turtles and tortoises can live for a very long time, with some living over 150 years.

Turtles' shells are part of their spine and ribs, forming a unique outer skeleton.

Turtles have a strong sense of smell, which they use to find food and even other turtles.