Condoms were originally made of animal intestines or linen.
347
George was the world's largest dog who weighed 233 pounds, stood at 43 inches tall from paw to shoulder, and ate 180 pounds of food a month.
7
A cow produces around 200,000 glasses of milk in her lifetime.
373
The seahorse is the only fish to have a neck.
12
Sharks, like other fish, have their reproductive organs in their chests.
248
Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
9
An alligator can go through 2,000 to 3,000 teeth in a lifetime.
268
Macaques monkeys in Japan learned to steal purses and wallets, take out the coins, and use them to buy drinks and snacks from vending machines.
26