But key questions remain about when exactly water first appeared on Mars and how it evolved — and disappeared — over time. Scientists analyzed a sample from the “Black Beauty” meteorite, also known as NWA 7034, that was found in the Sahara Desert in 2011. If hydrothermal systems existed in the Martian crust 4.45 billion years ago, liquid water likely made its way to the surface. “Many environments on Earth host life in hot water systems, including hot springs, and hydrothermal vents. Currently, the Perseverance rover is climbing the rim of Jezero Crater on Mars, an ancient lake once filled with water 3.7 billion years ago.

---

Persons: Mars, ”, Jack Gillespie, Carl Agee, Aaron Cavosie, Cavosie, Gillespie, “, ” Cavosie, Briony Horgan, Horgan, ” Horgan Organizations: CNN, University of Lausanne’s Faculty of Geosciences, ” Minerals, Institute of Meteoritics, University of New, Science, Technology Centre, Curtin University, Curtin University’s School of, Sciences, Purdue University Locations: Switzerland, University of New Mexico, Mars, West Lafayette , Indiana