According to the snowball Earth theory, the world was once entirely covered with glaciers. This would technically mean that the entire worlds was Antarctica! There was also a time when all of the continents were joined together, which you could also say was the largest Antarctica has ever been.
Unfortunately, satellite records of Antarctica only began in the 1970’s. It is necessary to note that every winter, the size of the Antarctic continent typically doubles in size when compared to its summer size. Its average size is 13,209,000 sq km, 5,100,021 sq miles and was not reported to have changed due to global warming but instead it seemed to be cooling. New or old icebergs only add about 300 sq km to the continental area and so do not make much of a difference. We can say that Antarctica is the same size now as it has been since satellite images have been able to capture the continent’s size.
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