Cats make over 100 different vocal sounds: dogs can make about ten.
Contrary to popular belief, dogs do not only sweat by salivating. They also sweat through the pours on their feet.
Dolphins sleep with one eye open.
All polar bears are left handed.
An elephant trunk has no bone but 40,000 muscles.
The most money ever paid for a cow in an auction was $1.3 million.
Penguins can convert salt water into fresh water.
A bald eagle can attack, kill, and carry away an animal as large as a small deer.
The walrus scientific name, Odobenus rosmarus, is Latin for 'tooth-walking sea-horse'.
Pumas don't really roar even though they are big cats. They prefer to make a series of sounds similar to whistles, squeaks and purrs.
A fox uses its tail (or "brush") as a warm cover in cold weather and as a signal flag to communicate with other foxes.
Tigers have striped skin, not just striped fur.
It is physically impossible for pigs to look up into the sky.
Male monkeys lose the hair on their heads in the same way men do.
The koala bear is not really a bear, but is really related to the kangaroo and the wombat.
An ostrich's eye is bigger than its brain.
Racehorses can wear out new horse shoes in one race.
An adult giraffe's tongue is 17 inches long.
Crocodiles swallow stones to help them dive deeper.
Black bears are not always black. They can be brown, cinnamon, yellow, and sometimes white.