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Weird Fact Wednesday! Only half a Dolphin's brain sleeps at ..
🕑 Added 2022-10-26 17:00:06 +0000 UTC Weird Fact Wednesday! Only half a Dolphin's brain sleeps at a time. Dolphins are mammals so although they live in the sea, and can hold their breath for an exceptionally long time, they do have to come up for air from time to time. It is for this reason that a Dolphin's brain will never fully disengage, as it still needs to retain enough motor control to occasionally go up to the surface and breath. Dolphins also sleep with one eye open at all times.
