Kangaroos (along with koalas, opossums, and Tasmanian devils) are marsupials, a type of mammal that nurtures its defenseless newborns in a pouch outside its body. While other types of mammals (known as placental mammals) grow their offspring inside the womb, marsupials give birth relatively early and continue their pregnancies in their pouches. The pouch fulfills all the life-support functions of the womb until the baby kangaroo (called a joey) is ready to hop on its own two feet. Sometimes, older and younger joeys will squeeze into the same pouch. Bet you’ll never complain about your room being cramped again.
Picture Credit : Google