Multiple choice general knowledge

Which animal sleeps wid a eye open?

  1. Whale

  2. Tortoise

  3. Panda

  4. Dolphin
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Dolphins sleep with one eye open due to unihemispheric slow-wave sleep - they shut down one half of their brain at a time while the other half remains conscious to breathe and watch for predators. This adaptation prevents drowning.

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