Martian regolith may block Earth microbes, tardigrades reveal through soil tests
TL;DR
Researchers exposed tardigrades to two Martian regolith simulants (MGS-1 and OUCM-1). MGS-1 caused notable stress and rapid dormancy, while OUCM-1 was less harmful. Washing the simulant reduced toxicity, indicating a water-soluble component—likely salts—drives the harm. The results suggest Mars’ soil chemistry could help prevent Earth microbes from contaminating the planet (a planetary-protection bonus), while also implying that treating regolith could eventually support plant growth on Mars.
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- Scientists Finally Found Something Tardigrades Can’t Survive Gizmodo
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