Life Learned To Breathe Oxygen Hundreds of Millions of Years Earlier Than Scientists Thought

Oxygen is everywhere on Earth today. But that hasn’t always been the case. Scientists think oxygen only became a lasting part ...
Earth.com

Oxygen-breathing life forms arrived on Earth much sooner than previously believed

Ancient enzymes show life’s nitrogen signal stayed unchanged for billions of years, helping scientists read early Earth.

Aerobic respiration began hundreds of millions of years earlier than previously thought, study suggests

Oxygen is a vital and constant presence on Earth today. But that hasn't always been the case. It wasn't until around 2.3 ...
The Conversation

Why do people and animals need to breathe? A biologist explains why you need a constant source of oxygen

Christina S. Baer does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond ...