Ever wondered how dolphins and whales sleep? Or maybe you're intrigued to know whether migrating birds ever find time to stop for a recharge?
The fact of the matter is, unlike humans, animals have some bizarre sleeping patterns.
The wild is a dangerous place, there are many predators, and - as a result - sleeping is something of a luxury.
This cute infographic explains the strange reasons behind how they sleep, including why otter couples sleep holding hands (n'aww) and why elephants snooze standing up.
It's both educational and enlightening. And we've also come to the conclusion that giraffes seriously need to adopt a Third Metric kind of lifestyle. Half an hour sleep? C'mon guys...
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