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 ...
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Spatial distribution and co-occurrence of aerobic ammonia oxidation and anaerobic ammonium oxidation activities in the water-soil interface, bulk, and rhizosphere regions of ...

This is a preview. Log in through your library . Abstract Purpose Aerobic ammonia oxidation often couples with anaerobic ammonium oxidation (anammox) in natural ecosystems; however, their in situ ...
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Early Life Forms May Have Used Oxygen Pre-Atmosphere

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 billion years ago that oxygen ...