Dinopedia
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A marsupial is a clade of mammal that differs from placentals and monotremes due to having a different way of giving birth.

With a pouch, a marsupial doesn't need a placenta like most mammals today, instead, it utilizes bacteria in the pouch and strong forelimbs on the joey to move around, attach to a nipple which swells up in its mouth so the joey doesn't let go, and constantly drink milk safely in its mothers pouch. With a different way of giving birth, marsupials have reproductive systems different in appearance and function than placentals.

The majority of marsupials are found in Australia, and have lived with the dinosaurs, before and after the K-Pg Extinction Event.

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