The Spanish start-up ChangeYourFlight enables travellers to make requests for partial refunds of plane tickets they know they are not going to use via a free, three-step process.
Researchers at MIT, led by Dr Mark Drela and tasked by NASA, have come up with a double-wide design: instead of the traditional single cylindrical body, two partial cylinders are joined together with three engines at the back of the plane between the double tail.