Multiple choice general knowledge

Dolphins sleep with one eye open. True or False?

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Dolphins exhibit unihemispheric slow-wave sleep, meaning they sleep with one half of their brain at a time and keep the corresponding opposite eye open. This allows them to watch for predators and maintain breathing at the water's surface.

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