make it so! 

Making Humans a Multi-Planetary Species - @elonmusk
http://online.liebertpub.com/doi/full/10.1089/space.2017.29009.emu …
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make it so! 

Making Humans a Multi-Planetary Species - @elonmusk
http://online.liebertpub.com/doi/full/10.1089/space.2017.29009.emu …