There's a problem with each of those continents...
[spoiler]...they all have people on them. Filthy, disgusting people. [/spoiler]
English
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Antarctica is mostly penguins.
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Aaahh-aah-aaaahh There be hoomans too. Not many, but they're there.
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But mostly penguins. Humans can't even breathe safely down there. It's almost as bad as visiting the moon.