Jellyfish as a species are actually older than dinosaurs and sharks.
383
Starfish don't have brains.
132
Mosquitoes don't just bite you, they also pee on you.
11
Cows as they are today never existed in the wild and were domesticated from aurochs some 10,500 years ago.
6
A blue whale's aorta (the main blood vessel) is large enough for a human to crawl through.
52
When Washoe, the first chimp to use sign language, was told that her caretaker's baby had died, she signed "CRY."
20