Time travel is the concept of movement between certain points in time, analogous to moving between different points in space by an object or a person, typically using a hypothetical device known as a time machine. Many have been fascinated by the concept, hoping one day they will be able to travel back in time to change their past decisions. However, renowned physicist Brian Cox has ruled out that possibility, but not the idea of time travel altogether.
Dr Cox, who is best known to the public for being his work with the BBC, is a professor of particle physics at the University of Manchester.
However, the 51-year-old also once sat on a panel for ABC’s “Q&A" programme, which puts experts together to discuss hot topics.
Asked in 2014 if it was possible to travel back in time, he said: “In Einstein’s theory, where you have a four-dimensional space, then you are prevented from travelling back in time.
“You can imagine wormholes and this idea that you can tunnel through and take shortcuts, but it would be like going from London to Australia through the Earth.