Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12
Sandy, an African Penguin, has been in 'love' with her keeper at the Nuremburg zoo since 1996.
34
Sharks have been on the planet longer than trees.
14
When the "Elephant Whisperer" Lawrence Anthony died, a whole herd of elephants arrived at his house to mourn him.
25
It's possible to train your cat to use the toilet as a litter box and even flush afterwards.
109
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
Cats sleep for 70% of their lives.
8