An alligator can go through 2,000 to 3,000 teeth in a lifetime.
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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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Early American humans hunted car-size armadillos and used their shells for houses.
12
The difference between antlers and horns is that antlers are shed each year and are made of bone while horns are kept for life and are made of living tissue and bone with a sheath that is very similar to human finger nails.
10
A scorpion can hold its breath for up to 6 days.
19
When dragonflies mate, their tails form a love heart.
22