Dogs have been man's pet for over 14,000 years.
224
The elephant brain weighs about 6,000g.
274
Dolphins can rapidly heal from extreme injuries, such as shark bites, and regenerate their original body shape.
19
In 2005, in Africa, it was reported that three lions rescued a 12-year-old girl from kidnappers and guarded her for half a day until help came.
46
It has been calculated that a single breath from a mature blue whale can inflate up to 2,000 balloons.
492
In 1949, an official boxing match between a bear and a man was held. The bear won.
41
The CIA once spent $20 million on a cat equipped with gear to spy on the Soviets, but it was hit by a taxi.
328
Sloths take two weeks to digest their food.
243