There's a young hippo and a 130+ year old tortoise in a Kenyan wildlife preserve who are best friends and they even sleep and play together.
40
Dire wolves actually existed, living up to 10,000 years ago before going extinct.
10
Squirrels forget where they hide about half of their nuts.
698
Dolphins have names for one another.
18
A koi fish, named "Hanako", was owned by several individuals over many years and lived to be 226 years old, dying in 1977.
6
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14