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Since Galileo first looked at the stars, telescopes and microscopes and the study of the properties of light have contributed to many of the great scientific breakthroughs.

Light has become an instrument of science, able to heat, cool, cut and manipulate matter in marvelous ways.

In this programme, Roland Pease sees how laser light creates the hottest and coldest materials on the planet, and how cells can be manouevred and dissected with beams of laser light.