So for years now, I've been of Stephen Hawking's opinion that asking what was before the big bang is a meaningless question since its like asking what's north of the North Pole. However, after watching BBC Horizon's What Happened Before the Big Bang, I have to admit that I am a little conflicted. Several scientists in the show, including Michio Kaku, seem to be of the opinion that "empty space" had existed before the big bang. This is confusing because I thought the big bang was supposed to be the origin of spacetime? Also, I recently spoke with a physics professor at a local university (guest presenter at our school) and he said that the big bang actually happened across multiple locations at once. This also confuses me because until that point, i had heard that the big bang came from a singularity. I am wondering what new evidence exists to show that the big bang wasn't the origin of space and time and what evidence exists to show that it happened across multiple locations.