This week Dezeen released Elevation, an 18-minute documentary that explores the impact drones will have on our lives. Here, we take a look at 10 innovative ways drones will change the world. Customers of supermarket giant Walmart may soon be able to summon assistance from unmanned aerial vehicles using mobile electronic devices. The vehicles will help locate products in store and advise on prices by crosscheck information stored on the store's central databases. PriestmanGoode's fleet of urban delivery drones, called Dragonfly, are featured in Dezeen's documentary.

Researchers in Singapore have built an underwater robot that looks and swims like a manta ray, using only single motors and flexible fins to propel it through water in a manner uncannily like its biological cousin. It's not the first of its kind - academics have spent years trying to mimic the wing-like movements of rays' pectoral fins - but Chew Chee Meng of the National University of Singapore says it's the first to use single motors for each fin and rely on the interplay of fluid and fin. One of nature's most efficient and graceful swimmers, manta rays have long fascinated scientists with a unique propulsion method to cruise through even turbulent seas, flapping their pectoral fins effortlessly to drive water backwards. The MandaDroid is designed after a juvenile manta ray. It measures 35 centimetres (13.8 inches) long, 63 centimetres wide (25 inches), and weighs just .7 kilograms (1.5 lbs).