In Back to the Future, Doc Brown is initially scared to tamper with the bounds of time, but his mindset changes thanks to ...

A speech by science adviser Michael Kratsios has attracted attention from people who think he means the U.S. now has time ...

The first rule of time travel is that you can only travel within your own lifetime. The second rule of time travel is that you can only stay for 90 seconds. And “The Third Rule of Time Travel ...