Dogs have been man's pet for over 14,000 years.
224
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
The elephant brain weighs about 6,000g.
274
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
Dolphins can rapidly heal from extreme injuries, such as shark bites, and regenerate their original body shape.
19
A 42-foot sperm whale has about 7 tons of oil in it.
209
A koi fish, named "Hanako", was owned by several individuals over many years and lived to be 226 years old, dying in 1977.
6