A Plasma Rocket Engine May Get Us To Mars In 40 Days (Elon Musk, Are You Listening?) Posted by Klaus Baldauf in Elon Musk, space travel Jul 62017 In his new book, “To Mars and Beyond — Fast,” seven-time Shuttle astronaut Franklin Chang Diaz explains the 40-days-to-Mars high concept in layman’s terms. But will it work? Read more