A kangaroo is one of a number of marsupial species that evolved on the continent of Australia after it was cut off from an ancient land bridge to Indonesia by a rise in the water level of the Pacific Ocean.
The kangaroo travels by means of two strong hind legs, hopping from place to place. The kangaroo's front legs are much smaller, and are adapted for grasping food and other objects. It has a large, muscular tail that helps with balance. Marsupials are distinguished from other mammals by having a pouch in the front of the female's body. The kangaroo baby crawls out of the mother's body and into the pouch at a very young stage of development. Development of the kangaroo baby is completed over many months during which the baby lives in the pouch feeding at the mother's nipples.