Ancient Phosphorus Recycling Identified as Key to Earth's Early Oxygen Levels

Researchers analyzing ancient rock have potentially solved a mystery regarding Earth's ability to maintain sufficient oxygen for life billions of years ago. Their findings, published in Nature Communications, suggest that phosphorus recycling in the oceans created a self-sustaining cycle, keeping oxygen levels high despite environmental shifts. This discovery challenges prior assumptions about Earth's early atmosphere and offers new insights into the emergence of complex life.