After years of anticipation, Karma Automotive has finally unveiled the Revero, a plug-in electric supercar powered by roof-mounted solar panels. In other transportation news, BMW launched an electrified version of its flagship sedan, and a new report shows that the UK will have more EV chargers than gas stations by the year 2020. Work continues on the Hyperloop: One company announced plans this week to build the world's first underwater supersonic transport tubes. And Republic Bike's kids cargo bike might just be the coolest ride for pint-sized commuters.