Add Yahoo as a preferred source to see more of our stories on Google. Michael J. Fox as Marty McFly in 'Back to the Future'; Joseph Gordon-Levitt as Joe in 'Looper'; Cristin Milioti as Sarah Wilder in ...

Humanity has a loaded relationship with time. There are moments we desperately wish to go back to the past and relive those glory days, just like some of us wish we could see a glimpse of the future ...