A kangaroo's pouch is much more complex than you might think

A kangaroo pouch may look like a simple pocket, but it's actually a complex nursery that contains everything a growing joey needs.The pouch is hairless on the inside, and is lined with sweat glands that release antimicrobial liquid to keep the joey safe from germs.It also has built-in nipples that release customized milk for every stage of the joey's development.
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Following is a transcript of the video.Narrator: At first glance, a kangaroo's pouch loo