How do scientists explain the cause of the Ice Age(s)?

Hi Jason,I'm going to go out on a limb here and discuss something I know very little about, but at which I still believe that I am correct.firstly, I firmly believe that a worldwide flood wouldn't cause an iceage.It's nothing to do with precipitation, it's everything to do with the colour of water. Water is rather dark, and it absorbs heat very well, as far as I know. Water is also a major, and I mean major, greenhouse gas.IMHO (and no, I don't have the math to back it up!) if you have water, water everywhere, you're going to get two things:1) a dark surface covering the planet, which would raise temperatures all over the entire planet, and melt the icecaps to boot
2) lots and lots of water in the air, which would also absorb lots and lots of heat, raising the temperature (and melting icecaps, releasing more water, etc, etc)with those two facts alone, I am more than certain that IF a worldwide flood had happened, we would not have an iceage.now, in addition to that, there's two things you need to know1) the bible doesn't describe an iceage - why wouldn't it?
2) how long do you think an iceage lasts? how long do you think an iceage takes to actually cover a significant portion of the planet, stay that way, and then finally recede?so that's two certain things against your theory, and the kicker is my pet theory which I would honestly like examined.

your logic...it is irrefutable!!!111oneoneonelevenIt's all so simple now - I renounce my evil ways. I just hope Thor can forgive me for all these years...it's only through his awesome hammer that we don't have to deal with ice trolls, so he's surely the reason we're not in an iceage, right?