Oxigênio

Where did the Earth's oxygen come from? The origin is in bacteria

Microbes have inhabited the planet for more than 4 billion years and their development has resulted in a flood of oxygen in the atmosphere - thank to them, we have life on Earth

About a fifth of all the air you breathe is composed of oxygen. Over two billion years ago, the chemical element has flooded the Earth's atmosphere and it is fundamental to life. But where did it come from?

It was the beginning of the oxygen flood, known as the "Great Oxidation Event", which changed life on Earth forever. Learn more about this process.

Grande evento de oxidação