Abstract
IN THE PAST 45 years, no-one has ventured further from the Earth's surface than the average height of the International Space Station's orbit (about 400km), which critics have characterised as being 'stuck in low-Earth orbit'. Well-publicised announcements on Mars colonisation from SpaceX CEO Musk suggest that NewSpace entrepreneurs are ready to pick up the space travel baton, but to some this is still science-fiction. Space policy expert and professor emeritus of political science at George Washington University, John Logsdon, says: Elon Musk's suggestion of a million-person city on Mars is almost pure fantasy. Why would that many people want to immigrate to a hostile environment? What would be the basis for a Martian economy to sustain them? Would they eat more than potatoes? Would there be good wine to drink?
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