Smallest laser sculpture

The smallest sculpture in the world using lasers was created by researchers at Osaka University, Japan on 15 August 2001 and is a three dimensional bull measuring seven thousandths of a millimetre high and ten thousandths of a millimetre long - the same size as a single red blood cell. In order to create the bull they used a technique they defined as 'two-photon micropolymerization' whereby two focused laser beams sculpt the bull from resin. When both lasers come together on a piece of the resin it hardens into place allowing the scientists to build the bull up gradually. The bull is so small that 30 could be placed side by side across the full stop at the end of this sentence.