I think you might be mistaken about Antarctica. It's a whole continent, 40%
larger than Europe, there are bases on its edges, and Amundsen-Scott at the pole, but the rest of the
continent is basically empty and unvisited, and the interior is
extremely hostile to life, the penguins make it look easier than it is to survive there. So unlike, say, New Zealand, where when humans arrived they brought rats which decimated the wildlife [and then white people brought even better rats which made it even worse] our impact is very limited.
In July, mid-winter, there's a skeleton crew for the entire interior. Only the Americans, with too much money and a prime research facility (the only place on Earth that is "dry" land and effectively not spinning) operate a winter base here, the Russians used to have one at a less interesting location but they decided that it's too expensive and of too little value and so they only staff it during the summer now.