Why is Antarctica known as an ‘Isolated Continent?’
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With the breakup on Gondwana about 180 million years ago Antarctica began to slowly move towards the south pole. As it became separated from the other landmasses a southern circumpolar current began to form. This allowed the continent to further cool as warm currents from the tropics were unable to reach Antarctica.
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Antarctica became isolated with the opening of the Drake Passage between the continent and South America sometime between 49 million and 17 million years ago, a time when land mammals diversified and flourished elsewhere, populating all the other continents of the world.
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