"An epic exploration of possibilities. What If is a Webby Award-winning science web series that takes you on a journey through hypothetical worlds and possibilities, some in distant corners of the ...

The Back to the Future franchise may revolve around them, but neither Doc Brown nor Marty McFly were the world's first time travelers. This is a point that many viewers can overlook about the ...

The grandfather paradox is just one of the thorny logical problems that arise with the concept of time travel. But one physicist says he has resolved them.

Contemplating all three time zones of past ... “Your Life from Now to 30 Years in the Future.” “Ages 30–35: You and your wife travel extensively, visiting places you've both dreamed ...