A physicist explains the overlooked problem that could doom Elon Musk’s Mars colonization plans: dust

The SpaceX board will grant Elon Musk 1 billion SpaceX shares if he can get a colony of 1 million humans on Mars. Kevin Carter/Getty Images Adam Becker, a physicist and author, evaluated Elon Musk's dream of colonizing Mars. Becker said one of the biggest obstacles to living on Mars is toxic and deadly dust. Musk founded SpaceX with the explicit goal of making humanity a "multi-planetary species." An astrophysicist is giving Elon Musk's dream of life on Mars a reality check. The SpaceX CEO…