Yesterday, I blogged about an anonymous YouTuber who appeared to have built a machine that could make Escher's impossible self-replenishing waterfall a concrete reality. David Goldman thinks he knows how it was done, and sent this diagram along.
I write books. My latest is a YA science fiction novel called Homeland (it's the sequel to Little Brother). More books: Rapture of the Nerds (a novel, with Charlie Stross); With a Little Help (short stories); and The Great Big Beautiful Tomorrow (novella and nonfic). I speak all over the place and I tweet and tumble, too.