About 10 months ago, Elon Musk, CEO of Tesla Motors and Space X, asked some engineers from both of these companies to help him invent a new form of transportation. Today he unveiled the design for what he calls the “hyperloop,” which would convey passengers from San Francisco to LA in about half an hour. It involves propelling 28-passenger “pods” through a tube at speeds of up to 760 miles per hour. The pods would be propelled by something called a linear motor, and they would ride on a cushion of air to minimize friction.
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