Making Life Multiplanetary: SpaceX 2016
Elon Musk's keynote presentation at the 2016 International Astronautical Congress outlining SpaceX's vision for Mars colonization.
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The deck argues that becoming a multiplanetary civilization is essential for long-term human survival, then presents the Interplanetary Transport System design that reduces per-person Mars mission costs from $10 billion to roughly $200,000 through full rocket reusability and in-orbit refueling. Mars settlement is presented as achievable within the present decade through advances in rocket engineering and self-sustaining city infrastructure.