Condoms were originally made of animal intestines or linen.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
Penguins have a gland above their eye that turns saltwater into freshwater.
12
The elephant brain weighs about 6,000g.
274
Tigers can see 6 times better at night than humans.
305
Parrotfish make themselves a kind of mucus 'sleeping bag' which masks their smell from predators and keeps parasites away.
4
When you shave a guinea pig it looks like a little hippo.
19