I have a theory on "weather" that I think bears discussion. It's pretty simple- "We don't know that we don't know what we don't know." People have only been keeping weather records to any degree over the last 100-150 years. Anything before the 20th century was often in the form of anecdotal evidence from journals and diaries, or some of the few newspaper accounts of the day. We don't know what changes have actually occurred over the long run. Ice core samples and geological digs, tree rings and all that is fine for generalities. But we don't know if 2019 is getting more rain in a certain area than in 1619 or 1119. We think in terms of our lifetimes, maybe our parents and grandparents too, but mostly it's what we think of as "normal". That's what? 20-30 years? Stretch it out to 50 or 60 years and it's still not even a pin prick in the calender of Old Mudder Erff. People, especially today, seem to think their surroundings should remain absolutely static from year to year. I don't know whether to put that down to a simple lack of insight or to hubris and arrogance. The Sahara was once lush grasslands and forests...