Sifrhippus was a species of horse about the size of an average duck and roamed North America 56 million years ago.
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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.
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Penguins have a gland above their eye that turns saltwater into freshwater.
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Mosquitoes prefer certain blood types, and people with the “O” blood type are more likely to get bitten.
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Jaguars frequently get high by eating hallucinogenic roots, which also increases their senses for hunting.
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Jumping fleas can accelerate 50 times faster than the space shuttle.
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