The elephant brain weighs about 6,000g.
274
An alligator can go through 2,000 to 3,000 teeth in a lifetime.
268
Bats sleep 18-20 hours per day.
5
There’s a bonobo named Kanzi who has learned to build a campfire and cook his own food.
8
Rattlesnake mating sessions have been known to last more than 22 hours.
232