Have We Contaminated the Moon?

Humans are full of microbes. Humans also went to the Moon. Does that mean we left colonies over there?
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Sources:http://www.lpi.usra.edu/meetings/sssr2011/presentations/rummel.pdf

https://web.archive.org/web/20100619225547/http://lsda.jsc.nasa.gov/scripts/experiment/exper.cfm?exp_index=1651

https://web.archive.org/web/20060831132850/http://www.astrobio.net/news/article1311.html

http://www.space.com/11536-moon-microbe-mystery-solved-apollo-12.html

http://science.nasa.gov/science-news/science-at-nasa/1998/ast01sep98_1/

http://adsabs.harvard.edu/full/1971LPSC....2.2721M

http://www.wired.co.uk/news/archive/2011-10/05/europa-bacteria

Видео Have We Contaminated the Moon? канала SciShow Space