Dolphins have names for one another.
18
Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12
Bats sleep 18-20 hours per day.
5
Travis was a chimpanzee who socialized with humans since birth. He could log onto a computer to look at pictures, watch TV using a remote control, brush his teeth, feed hay to his owner's horses, water plants, and learned the schedule of passing ice cream trucks.
11
The cat brain weighs about 30g.
167
In Australia, there are spiders big enough to eat snakes.
20