www.mediafax.ro/life-inedit/putem-calatori-in-viit

A Chinese physicist has proposed a mathematical demonstration questioning the feasibility of time travel to the past, suggesting certain spacetime properties prevent it. Hongsheng Zhang from Jinan University analyzed conditions under which an object might return to an earlier moment in its existence. His findings indicate that specific geometrical configurations of spacetime hinder the formation of paths allowing time travel. While some theoretical models suggest closed timelike curves could exist, Zhang emphasizes that this does not imply practical time travel is achievable. The study also highlights that moving towards the future is experimentally supported, as time dilation effects have been observed in high-speed and gravitational contexts. Zhang's research, published on arXiv, remains unverified by peer review, leaving open the question of whether the universe permits configurations that could allow time travel.