A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
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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.
7
A domestic cat can sprint at about 31 miles per hour.
274
Dogs have been man's pet for over 14,000 years.
224
When dragonflies mate, their tails form a love heart.
22
When a male gentoo penguin "falls in love" with a female penguin, he searches the entire beach to find the perfect pebble to present to her.
25
When Koko, the gorilla famous for knowing sign language, was asked where gorillas go after death, she responded by signing “Comfortable hole, bye.”
23