Dolphins sometimes have fun by blowing bubbles and creating rings of air underwater, which they then swim through.
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It has been calculated that a single breath from a mature blue whale can inflate up to 2,000 balloons.
492
When a male honey bee climaxes during sex, his testicles explode and then he dies.
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Vampire bats adopt orphans, and are one of the few mammals known to risk their own lives to share food with less fortunate roost-mates.
402
Dogs sometimes fake being sick to get attention.
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