Frigatebirds snooze in flight while penguins take four-second catnaps Emperor penguin chicks stand together in Antarctica. Penguin parents take thousands of catnaps a day while looking after their ...

It's an annual tradition: Fans, media, players, and everyone in-between denounce the Pro Bowl as a "popularity contest" after the results come. As predictable as it is – most arguments are typically ...

Every animal with a brain needs sleep — and even a few without a brain do, too. Humans sleep, birds sleep, whales sleep and even jellyfish sleep. Sleep is universal “even though it’s actually very ...

Nodding off Is Dangerous. Some Animals Have Evolved Extreme Ways to Sleep in Precarious Environments Every animal with a brain needs sleep — and even a few without a brain do, too. Humans sleep, birds ...