When NASA's Perseverance rover reached the inner edge of Mars' Jezero Crater in September 2023, mission scientists were surprised by what they found. The geologic area, called the "Margin Unit," stretches along the shoreline of an ancient Martian lake, so they expected sedimentary rocks, which w...
Source: [Phys.org](https://phys.org/news/2026-09-early-mars-reveal-episodes.html)