Summary:
- A marsupial is a therian mammal in which the embryo is born at an early, immature stage.
- The embryo completes its development outside the mother’s body in a pouch on her belly.
- Marsupials include the kangaroo, koala, and opossum.
- Only a minority of therian mammals are marsupials.
- They live mainly in Australia and are very different to any other bear.Marsupials have a different way of reproducing that reduces the mother's risks.