Rodents are mammals that continually chew food using incisors in the upper and lower jaws.

 Forty percents of mammal species are rodents.

They are found in all Continents except Antarctica.

The common rodents are mice, rats, squirrels, Beavers Gerbils, Capybaras, Prairie dogs Porcupine, Chipmunk, Guinea pigs and voles.

 Rodents make up the largest order of mammals.

The ancestors of rodents are from 65 million years ago.

They have suppose to suppose to appear during Cretaceous period.

There are 2,010 species of Rodents