It sounds like something straight out of a Christopher Nolan film, but scientists have suggested that there could actually be an 'anti-universe' where time runs backwards. And if you’re anything like us, your brain is probably starting to hurt already. It comes from experts studying symmetries, and the new research is all to do with the fundamentals of symmetry in nature – the most significant of which are charge, parity and time. Bear with us… According to LiveScience, a new paper recently accepted for publication in the journal Annals of Physics suggests that there is a combined symmetry to the entire universe. Sign up to our new free Indy100 weekly newsletter As the research attests, the early universe was so uniform that time looks symmetric going backwards and forwards. The paper argues that the way we understand the world and wider universe around us, moving forwards in time, must also be expanded to include a mirrored version which runs backwards in time. It could also provide a deeper understanding of dark matter, too. The theory suggests that it is an invisible particle which only interacts via gravity and provides a pairing to the electron-neutrino, muon-neutrino and tau-neutrino. The research suggests that the conditions in a mirrored universe where time runs backwards would be full of these paired neutrinos, which would account for dark matter. Of course, we’d never be able to experience time running backwards even if it did definitely exist, but it’s a pretty cool theory none-the-less. It comes after Elon Musk made headlines in the world of science and space travel, after giving his estimation for when humans will land on Mars for the first time. The first moon landing famously took place in 1969, but space enthusiasts have been debating when they think the first Mars landing will be – now, the SpaceX CEO thinks we’ll be up there by 2029. Have your say in our news democracy. Click the upvote icon at the top of the page to help raise this article through the indy100 rankings.