Chinese scientists claimed to have solved a critical flaw in the futuristic vision of ultra-high speed ground travel, potentially salvaging vacuum-tube maglev technology and casting new light on the challenges faced by Elon Musk’s Hyperloop concept. A study published by China’s peer-reviewed Journal of Railway Science and Engineering on May 16 showed that even minor imperfections – such as uneven coils or bridge deformations – would turn a journey into an ordeal, even in near-airless...