Cats recognise the voice of their owner, but never evolved to care.
22
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
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
Dolphins can rapidly heal from extreme injuries, such as shark bites, and regenerate their original body shape.
19
Lobsters have blue blood.
476