'Star Trek Replicator' May Turn Light To Matter

Physicists at Imperial College London are examining a theory, put forward in 1934, which proposed that smashing two photons - light particles - together could create matter. First, a high-intensity laser will be used to speed electrons to nearly the speed of light, then they will then be fired at a slab of gold. In a paper submitted to the Nature science journal, the researchers wrote: "This would provide the first realisation of a pure photon–photon collider, representing the advent of a new type of high-energy physics experiment."