There've been huge gains in prosthetics research and development in recent years. Now, one of the most sophisticated such pieces of technology we've ever seen seems to be on the horizon. The Food and Drug Administration just gave its approval to the DEKA Arm, a prosthetic limb that knows what action to take based on movements in the user's upper arm. Here's how it works: DEKA's sensors pick up on movements a user's muscles make and its computer determines what the brain wants it to do. Based on clinical trials, the DEKA Arm vastly outpaces other approved prosthetics, allowing users to do such physically complex tasks as safely grabbing delicate items like eggs or grapes. The project, which was funded by DARPA and is being built by a company owned by creator Dean Kamen, could viably disrupt the prosthetics industry in an unprecedented way. [via The Verge]