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Lessons from 'The Martian': How astronaut poop could help us settle the Red Planet
- Scientists show human waste combined with regolith can release plant nutrients, aiding soil formation for Moon and Mars bases.
- The Organic Processing Assembly in NASA’s Kennedy Space Center simulated sewage to create nutrient-rich effluent for regolith weathering.
- Experiments showed lunar regolith releases sulfur, calcium and magnesium when weathered with wastewater effluent.
- Martian simulant also released sodium along with sulfur, calcium, and magnesium.
- Researchers caution that real regolith may respond differently from the simulants used in the study.
- Essential nutrients like iron, zinc and copper remain missing from the weathered mixtures.
- The approach aims to enable in-situ resource utilization, avoiding repeated Earth imports for nutrients.
- The study is part of ongoing work to create soil-like materials for crops on the Moon and Mars.
- The researchers emphasize more experiments are needed to improve efficiency and applicability.
- The research was published in ACS Earth and Space Chemistry in January 2025.
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