Lobsters have blue blood.
476
Sharks have been on the planet longer than trees.
14
Parrotfish make themselves a kind of mucus 'sleeping bag' which masks their smell from predators and keeps parasites away.
4
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
Cows as they are today never existed in the wild and were domesticated from aurochs some 10,500 years ago.
6
Alligators can live up to 100 years.
337