When Washoe, the first chimp to use sign language, was told that her caretaker's baby had died, she signed "CRY."
20
Contrary to popular belief, dogs do not only sweat by salivating. They also sweat through the poors on their feet.
30
Iguanas have two penises!
55
The poison-arrow frog has enough poison to kill about 2,200 people!
55
A cow gives nearly 200,000 glasses of milk in her lifetime.
33
A blue whale's heart is the size of a Volkswagen Beetle!
37
Sergeant Stubby was the only war dog to be promoted to sergeant through combat in WWI. He saved his regiment from surprise mustard gas attacks, found and comforted the wounded, and even once caught a German spy by the seat of his pants, holding him there until American Soldiers found him.
16
Flamingos pee on their legs to cool themselves off.
49