Steve Caplin talks tech with Simon Rose. The Koreans are developing infrared lasers that can charge your phone when you walk into the room, while MIT has come up with batteries from aluminium, sulphur and salt, superior to the Li-ion type. There's also an idea for getting energy from waves, facial recognition for one type of salmon, how Surrey Police have been tricking drivers by manipulating Waze and an e-VTOL plane that can land in your garden – with an optional parachute.
