By: Adam Hadhazy, Life's Little Mysteries Contributor Published: 04/16/2012 12:32 PM EDT on Lifes Little Mysteries In this weekly series, Life's Little Mysteries rates the plausibility of popular science fiction concepts. In the first "Back to the Future" movie, all it took to travel through time was 1.21 gigawatts and a flux capacitor (packed into a DeLorean sports car for style points).