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
The most expensive cow in the world was sold in 2009 for $1.2 million.
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Cats are one of the only animals to domesticate themselves and approach humans on their own terms.
20
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
Female kangaroos have three vaginas.
2