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The South Africa-born billionaire’s space company has found massive success as a NASA contractor, but critics have for years panned Musk’s Mars colonization plans as overambitious.googletag.cmd.push(function() { googletag.display('div-gpt-ad-1499653692894-0'); });

The move also puts Musk in alignment with U.S. President Donald Trump’s shift away from sending Americans to Mars.

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