maybe it's all a big sphere of space but then that would mean it's not infinite and something is outside of it.

So, was it a big bang? If so was there a massive blob of matter in empty space? Was that a planet? Or was it just empty space and the matter came from else where? Or were the matter and space created at once? I need to go back to smoking pot. lol.

Imagine the upheavel if one day an alien visited and told us all about how they seeded this planet and created man. Some would think "well that makes sense" others would want to kill the alien for blasphemy.