Constraining the rise in atmospheric oxygen through the early Earth is important to understand the evolution of complex life. Here, the authors find that a major rise in atmospheric oxygen level occurred after the Great Oxidation Event, followed by pO2 within 1% of present atmospheric level through most of the Proterozoic Eon (2.4 to 0.65 Ga).
- Xiao-Ming Liu
- Linda C. Kah
- Robert M. Hazen
