Antarctica does not belong to any individual nation. It is just a seperate continental. However every country has the authority to use the land for research. Also in 1961, 45 countries signed a treaty to ban any military activity on the continent.
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No Countries own Antarctica, but some countries do claim territories in it they are;
Argentina
Australia
Chile
France
New Zealand
Norway
United Kingdom.
Argentina
Australia
Chile
France
New Zealand
Norway
United Kingdom.
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not any particular country, but many countries have established their base there.
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None, they made it off limits for any one nation to claim.