These flying robots invented by University of Pennsylvania researchers can self-assemble in flight — Quartz:
"Researchers at the University of Pennsylvania have developed a series of modular flying robots that can autonomously assemble themselves in midair and fly.
In the video above, the robots can be seen hovering near one another and then slowly moving close until magnets attached to each corner of a vehicle’s cage quickly snaps them together."Read More
'via Blog this'