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Related discussion: <a href="https://news.ycombinator.com/item?id=46011978">https://news.ycombinator.com/item?id=46011978</a> 2 days ago, 69 comments.
It lived in a vacuum, in high radiation conditions and with huge temperature fluctuations?
They put spores, that are more resistant to vacuum, lack of humidity, temperature fluctuation. I'm no sure about the radiation level, perhaps the containers were partially hidden by the structure.
panspermia anyone
Moss _spores_, not living moss. Big difference! 80% viable upon return, no mention of quarantine or mutations