Whales and dolphins can't taste anything other than salt.
11
One reason that kittens sleep so much is because a growth hormone is released only during sleep.
212
A newborn Chinese water deer is so small, it can (almost) be held in the palm of a hand.
13
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
Meysi is one of the world's smallest dogs, measuring in at just 7cm tall, 12cm long, and weighing a meagre 250 grams (only slightly heavier than a hamster!)
11
There is a sea snail that wears a suit of iron plated armor. It is the only known animal to use iron sulphide as skeletal material.
9
Early American humans hunted car-size armadillos and used their shells for houses.
12