Marsupials' distribution across continents can be traced back to the geological history of Earth.
Marsupials are primarily found in Australia, with some species also present in the Americas. The distribution of marsupials can be explained by the geological history of the continents. During the Mesozoic era, when Antarctica was connected to South America and Australia forming the supercontinent Pangaea, the ancestors of marsupials had the opportunity to migrate between landmasses.
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