The Deferred Dreams of Mars

https://www.technologyreview.com/s/429620/the-deferred-dreams-of-mars/?utm_source=newsletters&utm_medium=email&utm_content=2018_02_10&utm_campaign=weekend_reads&utm_source=MIT+Technology+Review&utm_campaign=34e285aadd-EMAIL_CAMPAIGN_2018_01_19&utm_medium=email&utm_term=0_997ed6f472-34e285aadd-153856085