Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
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Parrot parents "name" their children with a signature call.
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Bats sleep 18-20 hours per day.
5
The male seahorse carries babies and 'gives birth' to them instead of the female.
7
Nervous dogs wag their tails to the left, and happy dogs to the right (from the dog’s point of view) – and fellow canines pick up on this lop-sided tail language.
10