If the earth was flat, then obviously the South pole is at the centre (because theres a base there) so why cant we go beyond the north pole?
Your question does not make sense. As far as I know, nobody believes that Antarctica is at the center of the world, and you'll have to provide more evidence to support this notion than "because there's a base there".
How do you know nobody believes Antarctica is not at the centre?
Perhaps you missed the important qualifier, "as far as". It might help if you read slower.
Because its not what YOU pretend to believe?
It sounds like you've made an assumption about my beliefs.
If one postulates a map with either the north or south pole at the centre, it is far easier to have the south pole there
If you ignore the fact that if you travel north from Siberia, you won't encounter Antarctica any time soon.
I have made no assumption about your beliefs. Your phrase was "As far as I know, nobody believes that Antarctica is at the center of the world". This means that you CANNOT believe that, because "nobody" is self-inclusive. You didnt say "nobody except..." therefore your statement must apply to everyone that you have knowledge of, which MUST include yourself, because you know what you are thinking.
I get the impression that you think I mean that Antarctica is north of Siberia. This is not what I mean at all. I am suggesting that if the earth was a flat surface, Antarctica would be south of Australia, South America etc. Of course going north from Siberia you wouldnt encounter Antarctica, but I want to know why when you reach the north pole you cant just keep on going? Does the land extend beyond there? Is that where the edge is? You tell me...