Cats are famous for their ability to nap anywhere and everywhere, but horses have a cool naptime trick too. They can get some shut-eye while standing up! (Why couldn’t humans have inherited this ...

Turns out that lying down to catch some Zs is not universal. Some animals skip the whole “horizontal nap” deal and snooze upright like it's no big deal. It's a quirky, gravity-defying habit that makes ...

Humans consider standing on one leg something best done in a yoga class. Flamingos, on the other hand, consider it the most comfortable sleeping position. And they never seem to fall.