The Archean eon was a time when Earth's atmosphere and ocean were devoid ... This may favor purple sulfur bacteria living in ...

Both life and geological processes get their start in the Archaean era ... 3,800 mya: Bacteria diversify Single-celled bacteria are the oldest-known living organisms. Most bacteria reproduce ...

The subsequent Archean eon (approximately 3,500 million years ago) is known as the age of bacteria and archaea. The Proterozoic eon was the gathering up of oxygen in Earth's atmosphere ...

A new study suggests Earth's oceans may have been green during the Archean eon, around 3.8 to 1.8 billion ... The planet was occupied by single-celled organisms living in water.

The Archaean eon was a time when Earth's atmosphere ... This may favor purple sulphur bacteria living in deep waters without oxygen. It will lead to more purple, brown, or green hues in coastal ...

The Archaean eon was a time when Earth’s atmosphere ... This may favour purple sulphur bacteria living in deep waters without oxygen. It will lead to more purple, brown, or green hues in coastal ...

The Archaean eon was a time when Earth’s atmosphere and ocean were ... This may favour purple sulphur bacteria living in deep waters without oxygen. It will lead to more purple, brown, or green hues ...