Alright, this is my first NaNoWriMo, and I've decided to dip into my favorite genre (Science Fiction). Unfortunately, I have three distinctly different ideas, either of which is good, but I absolutely MUST choose one and stick to it! I'd love some input:

1) Aliens visit and offer to rocket us into the Golden Age, in exchange, they want our kids (12-18) as vessels for information, to teach them, to make them the next generation of the new human race. But there's a bit more to this than meets the eye, and things quickly get complicated.

2) The life of a race, from the it's single-celled origins, all the way till they reach the depths, and possibly discover whether God does or does not exist (This was inspired by a particularly interesting run of Spore, a recent video game)

3) A nigh-omnipotent alien being decides to perform a social engineering experiment on the human race to test a hypothesis. Unfortunately, the experiment has rather disastrous, apocalyptic results for us. The only surviving (and unwilling participant) of the experiment becomes the world's hottest commodity, as he may have somehow inherited a portion of this rather awesome power as a result. Let the race begin.

So...thoughts? Most opinions point to idea #1, or #3, and I need to specifically narrow it down.