Unmanned aerial vehicles are becoming more and more prevalent, allowing for our military to get views of areas from above without sending any humans into harm's way. But they're generally pretty passive, unable to pick stuff up. Not so with Yale's new Aerial Manipulator.
This UAV shares many characteristics with other UAVs, including a helicopter-like body and a top speed of 120km per hour. But it's also got a grabbing hand on its underside, allowing it to swoop in and grab things like bombs or unguarded sandwiches. And if that's not a significant advancement, I don't know what is.