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This interesting video is from the University of Pennsylvania where a team of roboticists are creating these little quadrotors. These things are incredible. They are able to maneuver through tight obstacles and fly in formation without hitting anything or each other.

This technology is cool. Just imagine the ways people could use these in the future.If they get them quiet enough, the military could use these things to scan buildings before enter. Also, these things can be used for search-and-rescue missions all around the world.