Here's why the confusion might arise:

* The Prime Meridian: This imaginary line divides the Earth into the Eastern and Western Hemispheres. It passes through Greenwich, England.

* Antarctica's Location: Antarctica is located south of the Prime Meridian, meaning the majority of its landmass falls within the Eastern Hemisphere.

* Meridian Lines: While the Prime Meridian is the most important, there are other meridian lines that extend from the North Pole to the South Pole, and these lines cross Antarctica. This means that some sections of Antarctica might be technically considered "Western Hemisphere" based on which meridian line is used.

However, the Prime Meridian is the primary reference point for Hemispheres, making Antarctica primarily an Eastern Hemisphere continent.