“This,” said roboticist Raffaello D’Andrea, is the “first installation to be built by flying machines.”
…four helicopterish thingies swooped through the air, somehow avoiding each other, and one by one, settled on some “brick dispensers.” Using small plungers they then plucked one brick at a time, carried each to the “building site” and slowly created a wall. It took a few days, but what emerged is a twisting, undulating tower, designed by Swiss architects Fabio Gramazio and Matthias Kohler.
via Krulwich Wonders.