Happy National Pencil Day! It was this day in, 1858, 156 years ago, that Hyman Lipman patented the first pencil with its own eraser. To celebrate, we're breaking our usual bi-weekly format to bring you a special "live" episode. (We can't, of course, really go live, but we can post it right away without editing.) Rather than a "main topic", we'll just cover a few pencil points, and then draw winners for our giveaway!