Two years ago, when Elon Musk published his 57-page blueprint for a 354-mile hyperloop, which could be described as a giant pneumatic tube, that would transport people between San Francisco and Los Angeles much faster than a hypothetical railway, the world dismissed the project as bad science fiction.
Musk’s rocket-building company, SpaceX, announced Monday that it plans to build a 1-mile test track next to its headquarters in the Los Angeles suburb of Hawthorne