this post was submitted on 10 Feb 2026
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Since https://www.space.com/18758-mars-rover-curiosity-discovery-hype-misunderstanding.html 2012
Not to mention formaldehyde in the atmosphere or the contaminated 1996 meteorites.
NASA has done an amazing job cataloging all of this and the international study of the samples is a herculean effort and enormous accomplishment.
But like, there's been microbial life on mars in it's history.
There is sufficient probability of planetary crosscontamination through material transport via impact ejecta, at least in the inner solar system.