The difference between antlers and horns is that antlers are shed each year and are made of bone while horns are kept for life and are made of living tissue and bone with a sheath that is very similar to human finger nails.
10
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
Sharks have been on the planet longer than trees.
14
Lobsters have blue blood.
476
Cats sleep for 70% of their lives.
8
Dolphins can rapidly heal from extreme injuries, such as shark bites, and regenerate their original body shape.
19
The male seahorse carries babies and 'gives birth' to them instead of the female.
7