Secrets of ancient life on Earth may live in Japan's hot springs
September 30, 2025
Some 2.3 billion years ago, the Earth would have been unrecognizable to us. At that time, ancient microorganisms were the dominant life form; there were no animals, no plant life, and certainly no humans.
But then, something changed. Oxygen-producing cyanobacteria triggered the Great Oxidation Event (GOE), which introduced atmospheric oxygen to our planet and allowed life as we know it to…