Editing Space colonization (section)

===Experiments with terrestrial analogues===
{{See also|Mars analog habitat|List of Mars analogs}}
[[File:Wiki bio2 sunset 001.jpg|thumb|upright=1.2|Biosphere 2 is a test habitat on Earth for space flight.]]
Many [[space agency|space agencies]] build "testbeds", which are facilities on Earth for testing advanced life support systems, but these are designed for long duration [[human spaceflight]], not permanent colonization.

*The most famous attempt to build an analogue to a self-sufficient settlement is [[Biosphere 2]], which attempted to duplicate Earth's biosphere. 
*[[BIOS-3]] is another [[closed ecosystem]], completed in 1972 in [[Krasnoyarsk]], [[Siberia]].<ref>{{Cite news|url=https://www.ecowatch.com/the-worlds-largest-earth-science-experiment-biosphere-2-1882107636.html|title=The World's Largest Earth Science Experiment: Biosphere 2|date=16 October 2015 |work=EcoWatch|access-date=14 August 2018|language=en|archive-url=https://web.archive.org/web/20180814040305/https://www.ecowatch.com/the-worlds-largest-earth-science-experiment-biosphere-2-1882107636.html|archive-date=14 August 2018|url-status=live}}</ref>
*The [[Mars Desert Research Station]] has a habitat for similar reasons, but the surrounding climate is not strictly inhospitable.<ref>{{Cite news|url=https://news.nationalgeographic.com/2016/12/exploring-mars-utah-mock-mission-simulation-space-science/|title=8 Amazing Places You Can Visit 'Mars' on Earth|first=Nadia |last=Drake |date=12 December 2016|access-date=13 August 2018|archive-url=https://web.archive.org/web/20180814040445/https://news.nationalgeographic.com/2016/12/exploring-mars-utah-mock-mission-simulation-space-science/|archive-date=14 August 2018|url-status=dead}}</ref>
*[[Devon Island]] [[Flashline Mars Arctic Research Station|Mars Arctic Research Station]], can also provide some practice for off-world outpost construction and operation.<ref>{{Cite news|url=https://www.mnn.com/earth-matters/wilderness-resources/stories/devon-island-close-mars-you-may-get|title=Devon Island is as close to Mars as you may get|work=MNN - Mother Nature Network|access-date=13 August 2018|language=en|archive-url=https://web.archive.org/web/20180814040256/https://www.mnn.com/earth-matters/wilderness-resources/stories/devon-island-close-mars-you-may-get|archive-date=14 August 2018|url-status=live}}</ref>