The elephant brain weighs about 6,000g.
274
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
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 1949, an official boxing match between a bear and a man was held. The bear won.
41
The octopus does not have a blind spot.
273
A newborn Chinese water deer is so small, it can (almost) be held in the palm of a hand.
13