Final Presentation for Geobiology

These are the slides for my final presentation in the Geobiology course at USTC in the Fall 2025 semester (Xiaolin Zhang’s class). The original assignment was for each student to choose one chapter from FUNDAMENTALS OF GEOBIOLOGY (Knoll et al.), and I chose the oxygen cycle. One issue with my presentation, however, is that the last slide should not have been Q&A; it should have been a Summary slide with a clear take-home message for the audience (thanks to David Catling for pointing that out).