On the Moon, astronaut pee will be a hot commodity

Patrick
Enlarge / Future moon bases could be built with 3D printers that mix materials such as Moon regolith, water, and astronauts’ urine.

Ever since President Donald Trump directed NASA to get boots on the Moon by 2024, the agency and its partners have been hard at work trying to make it happen. Late last month, NASA awarded contracts to three companies to develop a crewed lunar lander, but getting to the Moon is just the start. The agency also plans to build a permanent Moon basebefore the end of the decade and use it as a stepping

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