Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
An alligator can go through 2,000 to 3,000 teeth in a lifetime.
268
It would take about 1,200,000 mosquitoes to fully drain the average human body of blood.
217
Leonardo Da Vinci loved animals so much that he used to buy caged animals at the market just to set them free.
57
Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12
Cats are one of the only animals to domesticate themselves and approach humans on their own terms.
20
The reindeer is the only mammal that can see UV light.
17