A full-scale passenger Hyperloop capsule is presented by Hyperloop Transportation Technologies on October 2, 2018 in El Puerto de Santa Maria. - A hyperloop is a shuttle that travels on magnetic rails, somewhat like a train, but which runs in a tube with little or no air. In theory, hyperloops could allow travel faster than the speed of sound. Virgin Hyperloop One, backed by British tycoon Richard Branson, has been testing its hyperloop system in Nevada in the United States with speeds reaching 240 miles (386 kilometres) an hour, and is planning three production systems in service by 2021. (Photo by CRISTINA QUICLER / AFP)