In looking for research regarding how the world has been variable and climate has changed for millennia of years, I found this article that talks about how many important data are ignored when it comes to the IPCC's little black book. In short it discusses the possibility that there might be a bigger play in the universe that causes global warming. The Sun. Really, that big mass of constant nuclear fusion creating incomprehensible heat might have more of an effect on global warming than a small insignificant amount of a gas that's a natural byproduct of life on a planet.
"So one awkward question you can ask, when you’re forking out those extra taxes for climate change, is “Why is east Antarctica getting colder?” It makes no sense at all if carbon dioxide is driving global warming. While you’re at it, you might inquire whether Gordon Brown will give you a refund if it’s confirmed that global warming has stopped. The best measurements of global air temperatures come from American weather satellites, and they show wobbles but no overall change since 1999.
That levelling off is just what is expected by the chief rival hypothesis, which says that the sun drives climate changes more emphatically than greenhouse gases do. After becoming much more active during the 20th century, the sun now stands at a high but roughly level state of activity. Solar physicists warn of possible global cooling, should the sun revert to the lazier mood it was in during the Little Ice Age 300 years ago."
Read the whole thing, here.