Penguins have a gland above their eye that turns saltwater into freshwater.
12
Sharks, like other fish, have their reproductive organs in their chests.
248
Dogs have been man's pet for over 14,000 years.
224
One in three dog owners say they have talked to their pets on the phone.
427
Cows as they are today never existed in the wild and were domesticated from aurochs some 10,500 years ago.
6
Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12