I started out the new year yesterday with a corollary to a piece I posted last year about smarts (I gave you the wrong url for it — right one is http://www.theconversation.org/modules.php?op=modload&name=News&file=article&sid=176), and am following it up today with a matching piece to a post from last year about arts: illusions on sidewalks are joined now by illusions on trucks. These came from a contest in Germany “sponsored by an outfit that rents out advertising space on the sides of trucks,” and if you want to know more you can read all about it here: