I love astronomy, and one of my favorite RSS skims is Bad Astronomy. Actually that’s a bad lead-in, because this video has nothing at all to do with Astronomy, but now you know what you’re getting if you click that link.

Today Phil Plait (the blogger-in-charge there) offered up this optical illusion that was maddening to look at. Logically, you understand the visual pitfall, but optically you can’t force your brain to make the adjustments, so Einstein spins and spins, and like in real life, haunts the mediocrity of our minds.