Science Saturday: Measure a Black Hole + Biological Wi-Fi + Daytime Comet + Mars Sample Return + More
Welcome back to an exciting edition of Science Saturday! This week, measure the radius (and more!) of a supermassive black hole; have wi-fi (or, rather, bi-fi) installed in your body; ready for a dazzling comet show in 2013; and bring rocks back from Mars. All this and more, plus our gadget of the week: Wall-Ye, the French wine robot!