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Horses sleep standing up. Believe it or not, if they were to lay down for too long, their insides would collapse under their own weight. To accommodate this, they have a locking-type mechanism in their legs. That way, they can sleep and not fall over. But horses do take naps lying down. In fact, the only way they can get REM sleep is if they are laying down with their noses touching the ground.

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13y ago

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