Early American humans hunted car-size armadillos and used their shells for houses.
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It's possible to train your cat to use the toilet as a litter box and even flush afterwards.
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Cats are one of the only animals to domesticate themselves and approach humans on their own terms.
20
The oldest recorded elephant lived for 82 years.
213
When dragonflies mate, their tails form a love heart.
22
There's a rare breed of pig that looks like a sheep.
14