.@elonmusk Details His Vision For A Self-Sustaining City On Mars via @forbes http://www.forbes.com/sites/alexknapp/2017/06/14/elon-musk-details-his-vision-for-a-self-sustaining-city-on-mars-in-a-new-paper/#6353ca5a3bc9 …
3:45 PM - 14 Jun 2017
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