Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12
A puppy is born blind, deaf, and toothless.
16
Sharks, like other fish, have their reproductive organs in their chests.
248
Urechis unicinctus is a species of marine spoon worm that is widely referred to as the ‘penis fish’.
2
A newborn Chinese water deer is so small, it can (almost) be held in the palm of a hand.
13
Penguins have a gland above their eye that turns saltwater into freshwater.
12
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14