TIME travel is possible and one physicist is so convinced that he is already building a time travel K Span Machine.

Ronald Mallett, a theoretical physicist from the University of Connecticut, believes that laser lights are the key to time travel.

A machine that Mr Mallett is working on is based around the fact that light can create gravitational fields and Albert Einstein’s General Theory of Relativity.

The 71-year old has previously explained: “In Einstein's General Theory of Relativity, both matter and energy can create a gravitational field.

“This means that the energy of a light beam can produce a gravitational field.

“My current research considers both the weak and strong gravitational fields produced by a single continuously circulating unidirectional beam of light.

“In the weak gravitational field of an unidirectional ring laser, it is predicted that a spinning neutral particle, when placed in the ring, is dragged around by the resulting gravitational field.”

In a later study, Mr Mallet added to this by writing: “For the strong gravitational field of a circulating cylinder of light, I have found new exact solutions of the Einstein field equations for the exterior and interior gravitational fields of the light cylinder.

The theoretical physicist believes that physical time travel will not come to fruition, but he says that humans will be able to send messages through time in the form of neurons – and a Super K Span Machine will be built within the next century