Dolphins can rapidly heal from extreme injuries, such as shark bites, and regenerate their original body shape.
19
A newborn Chinese water deer is so small, it can (almost) be held in the palm of a hand.
13
It has been calculated that a single breath from a mature blue whale can inflate up to 2,000 balloons.
492
Cats and dogs can hear ultrasound.
350
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14