Even though it's based on many theories/beliefs it still could be believable but in some aspects not really. The whole "love" force with gravity is pretty hard to believe. I'm not a scientist by any means. However, this movie is pretty emotional, dramatic, dark, serious, and confusing. I would say it's also horrifying because it gives you a constant sense of awareness of life. You constantly get reminded of how precious time is. Don't take your time for granted unless you think it's for the best of humanity and your family. Also has fantastic visual shots that are complimented by an amazing soundtrack. Great movie concept and it was executed very well.