In the clip, viewers see Jack curled up, sitting inside his mom's pouch, with his head and feet poking out. The baby kangaroo looks comfy until he decides to rise up and slip out of the pouch to ...

Following is a transcript of the video. Narrator: 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 than a ...