Yes, we've yet to successfully send humans to Mars, but we already need to start thinking how we can stay there for long stretches of time -- or even for good. NASA launched the 3D-Printed Habitat Challenge back in 2015 to find a suitable artificial... 
https://ift.tt/2veB5OL support@endlesssupplies.ca (Endless Supplies .Ca) July 29, 2018 at 07:30PM
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