Time travel: Stephen Hawking’s last bombshell theory explained STEPHEN Hawking wrote in his posthumous book that tackling the paradox of time travel is a “very serious question”. Now one physicist has explained Prof Hawking’s theory. Share: Facebook Twitter Google+ Stumble Digg Email ThisBlogThis!Share to XShare to Facebook Related Posts:Meteor shower 2018: When is the next meteor shower? When are the Orionids?2018 Nobel Prize in Medicine Awarded to 2 Cancer Immunotherapy ResearchersScientists Surprised by Power of Indonesia TsunamiNEWS ANALYSIS: More Evidence That Nutrition Studies Don’t Always Add UpTrump Administration Prepares a Major Weakening of Mercury Emissions RulesOctober Full Moon: When is the October Full Moon? Why is it called the Hunter’s Moon?