Proterozoic Eon

The Proterozoic Eon lasted from about 2.5 billion to 540 million years ago, marking a significant period in Earth's history. During this time, the planet saw the development of stable continental landmasses and the appearance of simple life forms, primarily single-celled organisms like bacteria and algae. It was also when atmospheric oxygen levels began to rise, setting the stage for more complex life. The Proterozoic ended with the emergence of multicellular organisms, paving the way for the Cambrian Explosion, a major diversification of life. This eon is crucial for understanding Earth's early environment and biological evolution.