Condoms were originally made of animal intestines or linen.
347
Alligator snapping turtles can live for over 150 years. Scientists know this because some of the turtles had musket balls in their stomachs.
271
The first known contraceptive was crocodile dung, used by Egyptians in 2000 B.C.
79
Sharks, like other fish, have their reproductive organs in their chests.
248
The cat brain weighs about 30g.
167
The most expensive cow in the world was sold in 2009 for $1.2 million.
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