Dogs sometimes fake being sick to get attention.
26
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
Alligators can live up to 100 years.
337
Mosquitoes prefer certain blood types, and people with the “O” blood type are more likely to get bitten.
12
The sound of a tiger's roar can travel a distance of up to 2 miles (~3 km).
255
Female kangaroos have three vaginas.
2