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 ...

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 ...