A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
An average cat has 1-8 kittens per litter and can have 2-3 litters per year. During her productive life, one female cat could have more than 100 kittens. A single pair of cats and their kittens can produce as many as 420,000 kittens in just 7 years.
10
The octopus does not have a blind spot.
273
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
In the movie 'The Wizard Of Oz', Toto the dog's salary was $125 a week, while Judy Garland’s was $500 a week.
5
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132