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Why do koalas sleep almost all day long?

The Sleepy Superpower
Why do koalas sleep almost all day long?
~~Picture a koala~~ wedged in the fork of a tree, fast asleep, snoring softly through the afternoon. And the morning. An

Picture a koala wedged in the fork of a tree, fast asleep, snoring softly through the afternoon. And the morning. And, frankly, most of the night too. Koalas sleep around 18 to 22 hours a dayamong the sleepiest animals on Earth. But here's the twist: they're not lazy. They're running a very clever, very slow survival strategy.

It all starts with dinner. Koalas eat almost nothing but eucalyptus leaves. That's it. Same green leaves, all day, every day, for their whole lives. Most animals would rather not touch the stuff — and for good reason.

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