Explore the Great Oxidation Event (GOE) in this comprehensive 21-minute video. Learn about its timing, causes, and evidence, including fossil records, continental oxidation, banded iron formations, and isotopic data. Discover how cyanobacteria triggered the rise of oxygen 2.4-2.1 billion years ago and its impact on Earth's atmosphere and oceans. Delve into carbon isotope excursions, sulfur isotope fractionation, and molybdenum isotopes' sensitivity to redox conditions. Understand the Canfield Ocean concept and why it took so long for the Cambrian explosion to occur after Earth's oxygenation. Examine the GOE's effects on biological evolution and explore subsequent oxidation events in Earth's history.