Elon Musk's literal (transportation) pipe dream, Hyperloop One, just hit another critical milestone: The first Hyperloop test track—or really, test tube—is finished. The 1,640-foot long tube doesn't ...

Richard Branson is betting on the Hyperloop. Branson's Virgin Group has invested in Hyperloop One, the company that is attempting to build the ultra-fast transportation system championed by Elon Musk.