Alt-week 19.1.13: cloudy lasers, GPS drugs and proving George Lucas wrong

Alt-week takes a look at the best science and alternative tech stories. It's 2013 and yet somehow we haven't ascended into a creature made of pure energy, so we'd better put some clothes on and get back to work. We've got lasers that are made from gas, a team of student physicists that are determined to prove George Lucas wrong, the world's oldest underground railway celebrating its sesquicentennial and we'll learn how the NYPD wants to track drug addicts with GPS. If that doesn't sound like the...