The other one that was quite cool dealt with the death of Egypt's Old Kingdom... a massive drought that destroyed much of the entire region (I think that was on the "Green" network though... they're really out to push climate change cycles from antiquity. I underline the word "cycles" because it seems to fit closer to what a good number of researchers are seeing, the more they refine their studies around the subject. That's not to say we need to continue with the resource abuse as we've done the past 150ish years, but it does mean that "we" aren't the only cause behind what's happening.
I don't know, when it comes to the whole climate change stuff, I can't help but feel we're on Krypton sometimes...
