Eastern gray kangaroos roam the forests of Australia ... Females have one baby at a time, which at birth is smaller than a cherry. The infant immediately climbs into its mother's pouch and does ...

Narrator: At first glance, a kangaroo's pouch looks like nothing but a built-in baby sling ... will reach the size of a large house cat. That's thousands of times it's birth weight.

The baby grows for six months in the pouch until it "starts to pop its head out", conservationists say Animal conservationists have described the moment a rare tree kangaroo was seen emerging from ...