The first known contraceptive was crocodile dung, used by Egyptians in 2000 B.C.
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Jellyfish as a species are actually older than dinosaurs and sharks.
383
Dogs sometimes fake being sick to get attention.
26
The sound of a tiger's roar can travel a distance of up to 2 miles (~3 km).
255
Early American humans hunted car-size armadillos and used their shells for houses.
12
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
Lurch, a Watusi bull, had the largest horns in the world.
32