Here's a challenge to everyone, and please do go into detail with your answers:

Where did you come from?

Just take that one question and come up with the absolute best answer you can, based on everything you understand, and everything you think/have experienced. There is no right answer, this is just a "thought-exercise", and if done by enough people, this can create something quite...interesting.

So, answer away! but don't be hasty, give it lots of thought and care, and explain/back up as best possible everything you propose.

8)