By Sakshi Sah
Published Jun 15, 2025

Hindustan Times
Trending

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Unusual ways that animals sleep

Not all animals sleep the same way. Some rest while floating, others sleep standing up, and a few only rest part of their brain.

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Dolphins sleep by turning off one side of their brain at a time.

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Sea otters sleep while floating in the water.

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Elephants only sleep for about two hours a day. They take short naps, often standing up, especially in the wild.

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Koalas sleep up to 18-22 hours a day.

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Frogs have amazing sleep tricks. They hibernate in winter and even ‘sleep’ in summer (called estivation) to survive heat or dryness.

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Horses can sleep standing up.

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