Giraffes snooze in the most unexpected positions, surprising and delighting onlookers.

Giraffes are famous for their towering height, but this unique anatomy also shapes one of the strangest sleep patterns in the animal kingdom. Living on open grasslands with little shelter, giraffes ...

This is read by an automated voice. Please report any issues or inconsistencies here. Animals such as penguins and frigatebirds have evolved extreme sleep strategies — naps that last a few seconds, ...

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 ...