There are three groups of mammals, and the marsupials are one. All mammals are either Monotremes (echidnas and the platypus), Marsupials, or Placentals (us and dogs and monkeys and things).

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Babies exit the mother as a red jellybean-sized Stallone and must climb up the front and into her pouch.

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Researchers can tell when a mother marsupial is expecting because she begins preening her pouch. Before a new embryonic joey can climb into the pouch to suckle, the mother has to make way for the new kid, cleaning out her pouch.

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During the dinosaurs’ final days, the ancestors of marsupials were huge in South America. Since they didn’t have placental mammals to compete with, there were sabre-toothed marsupials, ferocious bear-like marsupials and more.

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The separation of Australia from Antarctica occurred around 80 million years ago. Seafloor spreading had pushed the two continents away from one another, filling the gap with an ocean about 100 km wide.

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