Vampire bats adopt orphans, and are one of the few mammals known to risk their own lives to share food with less fortunate roost-mates.
402
A banana slug can be 6-8 inches and their erect penis can be just as long. Also, their penises emerge from their heads. After sex, banana slugs eat each others penises.
17
Giant Anteaters' front legs look like a panda.
48
Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12
There's a lizard known as the 'Jesus Lizard' that can run across water.
11
Cats and dogs can hear ultrasound.
350