Allegedly, Chrysippus, the Greek philosopher, died of laughter after getting his donkey drunk and watching it try to eat figs.
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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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Parrot parents "name" their children with a signature call.
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Dolphins have names for one another.
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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.
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The world’s largest frog, the Goliath frog, can grow over 13 inches in length and can jump up to 10 feet in a single bound.
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