Elon Musk has a plan, and it's about as audacious as they come. Not content with living on our pale blue dot, Musk and his company SpaceX want to colonize Mars, fast. They say they'll send a duo of supply ships to the red planet within five years. By 2024, they're aiming to send the first humans. From there they have visions of building a space port, a city and, ultimately, a planet they'd like to "geoengineer" to be as welcoming as a second Earth.
If he succeeds, Musk could thoroughly transform our relationship with our solar system, inspiring a new generation of scientists and engineers along the way. But between here and success, Musk and SpaceX will need to traverse an unbelievably complex risk landscape.
Many will be technical. The rocket that's going to take Musk's colonizers to Mars (code named the "BFR" – no prizes for guessing what that stands for) hasn't even been built yet. No one knows what hidden hurdles will emerge as testing begins. Musk does have a habit of successfully solving complex engineering problems though; and despite the mountainous technical challenges SpaceX faces, there's a fair chance they'll succeed.
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As a scholar of risk innovation, what I'm not sure about is how SpaceX will handle some of the less obvious social and political hurdles they face. To give Elon Musk a bit of a head start, here are some of the obstacles I think he should have on his mission-to-Mars checklist.