"Things You Wouldn't Know If We Didn't Blog Intermittently."
Gorgeous picture!I know you already have a reading list to last multiple lifetimes, but if you haven't checked it yet, I think you'll greatly enjoy The Cloudspotter's Guide by Gavin Pretor-Pinney (founder of the Cloud Appreciation Society).
Ah, I see my halo is waiting for me, shame I'm going the other way.xoxoxoBruce
China has been doing a ton of cloud seeding to fight off a drought, wonder if this could be related at all?
Not saying it couldn't, but cloud iridescence is a completely natural phenomenon. No chemicals (other than water) needed!