Dolphins can rapidly heal from extreme injuries, such as shark bites, and regenerate their original body shape.
19
Dolphins have names for one another.
18
An alligator can go through 2,000 to 3,000 teeth in a lifetime.
268
Dire wolves actually existed, living up to 10,000 years ago before going extinct.
10
George was the world's largest dog who weighed 233 pounds, stood at 43 inches tall from paw to shoulder, and ate 180 pounds of food a month.
7
Cats sleep for 70% of their lives.
8