How do sloths sleep upside down without letting go?

Sloths are really, really good at hanging upside down. They practically make it seem effortless! Why is that? Do they love it? Is the world just more fun from that angle? We asked zoologist Lucy Cooke to help us figure it out.

Sloths are really, really good at hanging upside down. They practically make it seem effortless! Why is that? Do they love it? Is the world just more fun from that angle? We asked zoologist Lucy Cooke to help us figure it out.
Got a question that’s clawing at your brain? Send it to us at BrainsOn.org/contact, and hang in there - we’ll help you find the answer.

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Smash Boom Best is a debate show for kids and families from the makers of the award-winning podcast, Brains On! Every episode takes two cool things, smashes them together and lets you decide which is best.


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Our mission is to encourage kids’ and curious adults’ natural curiosity and wonder using science and history…but there’s no age limit on curiosity, and episodes of Brains On can be enjoyed by anyone.


How do sloths sleep upside down without letting go?

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