Time travel has been a beloved topic of science fiction writers ever since HG Wells wrote about it in The Time Machine, published in 1895.
We tend to think of it as a far-out concept, and one that could never happen. Well, the reality is that time travel to the future has already happened. It’s a done deal.
Time travel to the past, meanwhile, is trickier, but should also be possible – in time! Just in case you’re wondering, however, it is not possible to travel to the past, and make changes.
To find out more about this mind-binding concept, and what is, and what isn’t possible I spoke to Professor Paul Davies, a scientist based at Arizona State University, who wrote a book on this subject called How to Build a Time Machine.
Prof Davies is a physicist, cosmologist, astrobiologist, science writer and founder of the Beyond: Center for Fundamental Concepts in Science, which looks at some of the biggest and most important questions facing science and mankind.
Broadcast on Science Spinning on 103.2 Dublin City FM on 08.12.2011