Sergeant Stubby was the only war dog to be promoted to sergeant through combat in WWI. He saved his regiment from surprise mustard gas attacks, found and comforted the wounded, and even once caught a German spy by the seat of his pants, holding him there until American Soldiers found him.
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A koi fish, named "Hanako", was owned by several individuals over many years and lived to be 226 years old, dying in 1977.
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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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When a male gentoo penguin "falls in love" with a female penguin, he searches the entire beach to find the perfect pebble to present to her.
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A newborn Chinese water deer is so small, it can (almost) be held in the palm of a hand.
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When a male honey bee climaxes during sex, his testicles explode and then he dies.
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