A full-grown bear can run as fast as a horse.
35
The male praying mantis cannot copulate while its head is attached to its body. The female initiates sex by ripping the males head off.
85
Human birth control pills work on gorillas.
52
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 male gypsy moth can "smell" the virgin female gypsy moth from 1.8 miles away!
55
Rats multiply so quickly that in 18 months, two rats could have over a million descendants.
33
Sharks, like other fish, have their reproductive organs in their chests.
248
A blue whale's heart is the size of a Volkswagen Beetle!
37