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Why did marsupials come to dominate Australia’s mammal fauna, unlike in India?

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1. Why did marsupials come to dominate Australia’s mammal fauna, unlike in India?

Australia has always been directly attached to Asia

Once Australia split from Antarctica (~35 mya), marsupials had the continent to themselves with no placental competitors

Marsupials were deliberately introduced to Australia by early humans

Australia’s climate is uniquely suited only to marsupials, not placental mammals

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