"I want to share hard-won “a ha!” moments in clear and simple language."

I looked at a couple of articles and they seem to achieve this pretty well. http://betterexplained.com/articles/understanding-quakes-fas... is a great explanation (previously discussed: http://news.ycombinator.com/item?id=419166) - it omits some detail to better convey the key ideas.

This one's going in my RSS reader.