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News
Mars has been called the Red Planet for centuries, but a 2025 study suggests its colour comes largely from ferrihydrite—an iron mineral that typically forms rapidly in cool liquid water. If the identification is correct, Mars did not rust only after becoming a desert: much of its famous red dust formed while the ancient planet was still wet.
1+ week, 1+ day ago (1584+ words) A 2025 spectral and laboratory study points to hydrated ferrihydrite as the chief pigment in Martian dust, tying the planet's colour to its wetter ancient climate. By Deep Field · Edited by Lachlan Brown Published September 6, 2026 · How we edit From Earth, Mars…...