Perseverance finds evidence of at least three separate water episodes on Mars

NASA's Perseverance rover found rocks at the inner edge of Jezero Crater pointing to at least three separate water episodes. Instead of expected sedimentary rocks, the Margin Unit contains carbonates and volcanic material, reshaping views of the ancient lake.

• Perseverance reached the inner edge of Jezero Crater in September 2023
• The Margin Unit held carbonates and volcanic rocks instead of expected sedimentary layers
• Data points to at least three separate water episodes in the ancient lake