Will scientists ever prove the existence of dark matter?

Astronomers in the US are setting up an experiment which, if it fails - as others have - could mark the end of a 30-year-old theory

Deep underground, in a defunct gold mine in South Dakota, scientists are assembling an array of odd devices: a chamber for holding tonnes of xenon gas; hundreds of light detectors, each capable of pinpointing a single photon; and a vast tank that will be filled with hundreds of gallons of ultra-pure water. The project, the LZ experiment, has a straightforward aim: it is designed to detect particles of an invisible form of matter - called dark matter - as they drift through space.

It is thought there is five times more dark matter than normal matter in the universe, although it has yet to be detected directly. Finding it would solve one of science's most baffling mysteries and explain why galaxies are not ripped apart by stars flying off into deep space.