Roll your own radio. If you've got an MP3 player and iTunes (Mac or PC), you can build your own daily audio digest, piece by piece. Here's how: more inside

The Matrix! Vision! Reality! FERRETS. Recently, a University of Rochester scientist sat a bunch of ferrets down in front of a TV and had them watch “The Matrix.” He discovered that their visual cortexes worked like crazy even in the total absence of visual stimulus. (He observed this as the ferrets were watching Keanu Reeves emote. Wait, no, they were in a dark room.) Here’s the implication: more inside