NASA’s Perseverance Rover Finds Mars Had a Far More Complicated Water History Than Expected

A new study suggests that Jezero Crater’s mysterious “Margin Unit” records a surprisingly complicated history involving ancient lakes, groundwater, and heated fluids moving through the Martian subsurface. When NASA’s Perseverance rover arrived at the inner rim of Mars’ Jezero Crater in September 2023, scientists expected to encounter sedimentary rock. The region, known as the “Margin [...]