The Great Oxidation Event, which occurred around 2.4 billion years ago, was a period when Earth's atmosphere transitioned from being predominantly anoxic (low oxygen content) to aerobic (high oxygen content). This event was a crucial step in the evolution of life on Earth as it allowed for the emergence of aerobic organisms.
The causes of the Great Oxidation Event are still debated among scientists, but several theories have been proposed, including changes in volcanic activity, shifts in the composition of the Earth's crust, and the evolution of photosynthetic organisms such as cyanobacteria. A nickel famine is not considered a likely trigger for this event.
