But will the penguins even be awake at night? The aquarium assures its guests that they will be. “Don’t worry — African penguins have unusual sleeping patterns and will keep you entertained until your ...

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 ...