Narrator: At first glance, a kangaroo's pouch ... baby. An adult male red kangaroo can stand over 1 1/2 meters tall and weigh 90 kilograms. That's larger than a grown man. But the newborns start ...

Let's take a look deep inside these distinctive ... At first glance, a kangaroo's pouch looks like nothing but a built-in baby sling. But if you peeked inside, you'd see it's far more complex ...