Steve Caplin talks Simon Rose through the latest tech. A white dwarf predicted to hit the earth now apparently won't. Google's new weather prediction computer can massively improve the accuracy of forecasts. A crane has been designed to shin up wind turbines to repair them. A record-breaking supercar has set a new one – for driving backward. Japanese scientists have produced a plastic that not only self heals but turns into fish food. There's a new way of reading drums for sound checks. A crowdfunded multitool even has an adjustable spanner. And North American scientists have come up with an app that can tell if somebody is drunk or not.