If you were wondering how the pyramids were built, this is probably how. Sound technology.
Scientists at the University of Sussex in collaboration with Ultrahaptics have created the first sonic tractor beam that can lift objects using just sound waves.
The tractor beam works by using 64 miniature loudspeakers to create high-pitch and high-intensity sound waves. The resulting waves surround the object with sound and this creates a force field that keeps the object in place. By carefully controlling the output of the loudspeakers the object can be either be held in place, moved or rotated.