Water Wash Could Help Tardigrades Survive Martian Dirt, Boosting Mars Farming Prospects
Two tardigrade species were placed in Mars regolith simulants (MGS-1 and OUCM-1) and in Earth sand as a control. In the regolith, tardigrades died off quickly, especially Hypsibius exemplaris, while Ramazzottius cf. varieornatus fared somewhat better but still declined. When the simulant was rinsed with water, tardigrades survived longer and remained active, suggesting a water-soluble, damaging component in MGS-1. The finding could inform future Mars agriculture and planetary protection, though researchers did not test radiation, temperature, or other environmental factors, and the exact cause remains to be identified. The study was published in the International Journal of Astrobiology.