Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
Travis was a chimpanzee who socialized with humans since birth. He could log onto a computer to look at pictures, watch TV using a remote control, brush his teeth, feed hay to his owner's horses, water plants, and learned the schedule of passing ice cream trucks.
11
Cats recognise the voice of their owner, but never evolved to care.
22
A banana slug can be 6-8 inches and their erect penis can be just as long. Also, their penises emerge from their heads. After sex, banana slugs eat each others penises.
17
Sharks have been on the planet longer than trees.
14
Dogs sometimes fake being sick to get attention.
26
Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
6
It would take about 1,200,000 mosquitoes to fully drain the average human body of blood.
217