Ask a Physicist: Is Time Travel Possible?

Luke, from California, wrote in last week: I'm writing a research paper on time travel. Do you think time travel is possible? Hi Luke,Are we talking backwards or forwards here?One of the most interesting aspects of Einstein's relativity is that, the faster you move, the slower time passes for you. If you're writing a paper, you'll want to read our previous article on why time dilation occursand how to calculate it--but the quick explanation is that it's a consequence of lightspeed being the univ...