The Basenji dog is the only dog that is not able to bark.
4
There's a rare breed of pig that looks like a sheep.
14
An alligator can go through 2,000 to 3,000 teeth in a lifetime.
268
Dolphins sometimes have fun by blowing bubbles and creating rings of air underwater, which they then swim through.
17
Dire wolves actually existed, living up to 10,000 years ago before going extinct.
10