A group of kittens is called a "kindle".
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When dragonflies mate, their tails form a love heart.
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Mosquitoes prefer certain blood types, and people with the “O” blood type are more likely to get bitten.
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An alligator can go through 2,000 to 3,000 teeth in a lifetime.
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Nervous dogs wag their tails to the left, and happy dogs to the right (from the dog’s point of view) – and fellow canines pick up on this lop-sided tail language.
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