Deep Earth Magma Holds Unexpected Oxygen Reservoir, May Explain Atmospheric Evolution

Scientists have found that magma deep beneath the Earth's surface can hold large amounts of oxygen, a discovery that could explain how the planet’s atmosphere became rich in oxygen billions of years ago. The study, published in ScienceDaily, shows that ancient volcanic eruptions released this stored oxygen into the atmosphere, contributing to the rise of oxygen that enabled complex life. The finding also offers a new perspective on how planetary atmospheres might evolve, informing the search for life on other worlds. Researchers plan to investigate how much oxygen was released and how it interacted with early Earth’s chemistry. Future work will model the release rates and assess the impact on early biogeochemical cycles.