A team of researchers has made a groundbreaking discovery about the properties of magma deep within Earth. Through high-pressure experiments and advanced computer simulations, they found that molten rock can absorb and store additional oxygen beyond what is normally expected. This hidden oxygen could have played a significant role in shaping Earth's atmosphere billions of years ago. The study, led by Dr. Yanhao Lin and Dr. Ho-kwang Mao, involved recreating the extreme conditions found deep within Earth using laboratory equipment. They heated synthetic volcanic rock to temperatures between 1200 and 1800°C and subjected it to pressures of up to 7 gigapascals, equivalent to 69,000 times the atmospheric pressure at Earth's surface. The researchers added platinum oxide to the molten rock to create an oxygen-rich environment and measured the amount of excess oxygen present. They found that at high pressures, the molten rock could store up to 5% of its weight in excess oxygen, a significant increase from the 0.2-0.5% found in experiments without added platinum oxide. The team also used Raman spectroscopy to determine that the excess oxygen was incorporated into the glass structure of the molten rock, rather than accumulating as gas bubbles. This suggests that magma can store oxygen independently of its chemical composition. Computer simulations, led by Prof. Haiyang Niu, supported the findings and showed that additional oxygen can dissolve into molten material until the system reaches equilibrium. The simulations also revealed changes in how oxygen atoms behave as more oxygen enters the melt, forming peroxide-like bonds and altering their electrical charges. The discovery has significant implications for our understanding of Earth's history and the development of its atmosphere. The researchers propose that magma may have transported significant amounts of oxygen from the planet's interior to its surface, potentially contributing to the oxygen-rich atmosphere we see today. This finding opens up new avenues for research into the Earth's interior and the role of magma in shaping our planet's atmosphere. It also raises questions about the potential for similar processes to occur on other planets and moons in our solar system.