Remember the theory that the ancients built the pyramids by using sound? New Article: Acoustic levitation: Chemical reaction lifted by sound

Scientists at the Swiss Federal Institute of Technology (ETH) in Zurich, Switzerland have designed an acoustic levitator capable of controlling and mixing substances as they hover between two platforms.

The device is built of two facing platforms made up of sound-emitting squares that trap the substances between them. The sound waves move upward until they reach the surface lying above, whereupon they bounce back. When upward and downward-moving waves overlap, they cancel out and trap materials in place.

[link to www.bbc.co.uk]