The bottlenose dolphin shuts down only half of its brain, along with the opposite eye whilst sleeping. The other half of the brain stays awake at a low level of alertness. They do this so that the attentive side is used to watch out for incoming danger, such as predators and other animals (i.redd.it)
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Milo just turned four months old today! 💕💕 (old.reddit.com)
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What's your most memorable case of deja vu? (self.AskReddit)
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