Deep-Earth Magma May Hold a Missing Clue to Oxygen-Rich Atmosphere
A new study suggests that Earth’s deep mantle may have stored and later released excess oxygen through magma processes, offering a fresh explanation for how the planet’s atmosphere became oxygen-rich. The findings add a new layer to the long-running debate over the Great Oxidation Event and the role of ancient weathering, volcanism and mantle chemistry in shaping Earth’s habitability.
