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The Big Falcon Rocket (BFR), which SpaceX is developing to colonize Mars, is on a path to begin flight tests in the first half of 2019, according to company founder Elon Musk.Initial tests will probably be short up-and-down flights, Musk said March 11 at the South by Southwest Conference in Austin, Texas. Musk acknowledged that the test schedule could change.“I’m feeling pretty optimistic about the timeline, although … people have told me that my timelines historically have been optimistic,” Musk said. “So…
