A Popthem is an insight. It comes from the word apothegm - a comment, an anecdote, a statement - something that turns on that light bulb in your brain and makes you think - "so that's what really happened", or "so that's what it means". It's stuff we've read that we found illuminating and that we want to share with others by posting on this blog.
See Leondardoswall.com for the latest in how Leondardo Da Vinci got his ideas.