487K views · 3.4K reactions | Is it actually possible to travel through time? Scientists say "Yes", but what does that actually mean? Check out today's insane time-warping new video to discover actual scientific theories that make time travel a real possibility! Prepare to have your mind blown! | The Infographics Show | Facebook

Harvard Scientist: "You can, in principle, go back in time and k*ll your grandfather. And that would be a problem, because if you k*ll your grandfather, how come you exist? So, physicists don't like the idea of time machines because it leads to contradictions. And if you have a negative mass, you can build a time machine." #science #scientist #physics #history #engineering #podcast #shawnryanshow | Shawn Ryan Show