In the 60s, a scientist gave LSD to dolphins in an attempt to teach them English.
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Using a remote-controlled camera, biologists caught dolphins getting high by sucking on puffer fish. They were even caught passing the puffer fish around.
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Dolphins can rapidly heal from extreme injuries, such as shark bites, and regenerate their original body shape.
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Whales and dolphins can't taste anything other than salt.
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Dolphins have names for one another.
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Dolphins sometimes have fun by blowing bubbles and creating rings of air underwater, which they then swim through.
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