See a lunar scar darken the crescent moon tonightBy otako_fzbgs4 / May 29, 2025 Lunar maria or ‘seas’ formed when lava flooded impact basins billions of years ago. Related posts: Catch solar bursts in new citizen science project Sped-up simulation of Hera’s Mars flyby Hera asteroid mission’s Mars flyby Watch live: Images from Hera’s Mars flyby