Drone fleets could find lost hikers in forests without using GPS

Drones can already be effective search and rescue tools, but not in densely-packed forests where the tree cover might block GPS signals. Thankfully, MIT has a clever solution: use the same technology that guides self-driving cars. Its researchers hav... https://ift.tt/2PDcnnz Jon Fingas November 04, 2018 at 08:56PM