NASA’s Curiosity Finds Surprise Clues to Mars’ Watery Past
February 9, 2023
When NASA’s Curiosity rover arrived at the “sulfate-bearing unit” last fall, scientists thought they’d seen the last evidence that lakes once covered this region of Mars. That’s because the rock layers here formed in drier settings than regions explored earlier in the mission. The area’s sulfates – salty minerals – are thought to have been left behind when water was drying to a…
