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Kelly and Zach Weinersmith discuss their new book, which throws a bit of a wet blanket on the idea of future space colonies.

United statesNeil armstrongZach weinersmithKelly weinersmithHoustonians zachMichael hagertyBiosciences department at rice universityBiosciences departmentSaturday morning breakfastHouston mattersFormer houstonians zachSpace is cheaperWe ve learnedInternational space stationWhich memberHealth amp science