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 Did you know? |
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Dolphins are mammals, not fish. They are warm blooded like man, and give birth to one baby, called a calf, at a time. |
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If dolphins are not conscious they cannot breathe. That means they cannot ever go into a deep sleep; they'll otherwise suffocate and die. What do they do then? Well, they decided that they will sleep by letting only one half of the brain sleep at a time. Smart, isn't it? This way, they manage to get about 8 hours of sleep a day. |
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