TechnologyHow to make sustainable batteries that won't wreck the planet The batteries we need to power the transition to 100-per-cent renewable electricity require rare metals, and that means destructive mining – but researchers are working on alternatives Features
TechnologyGPS software boost lets smartphones pinpoint location to within 20 cm The software that allows smartphones to locate themselves is generally accurate only to within a few metres, but UK start-up Naurt claims its software can locate a device to within 20 centimetres News