Life on Earth may have learned to breathe oxygen long before oxygen filled the skies. MIT researchers traced a key ...
Most living things, including humans, rely on oxygen to survive. However, some bacteria have a completely different way of making energy. Instead of breathing oxygen, they breathe electricity.
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 became a permanent fixture in the atmosphere, ...
Ancient enzymes show life’s nitrogen signal stayed unchanged for billions of years, helping scientists read early Earth.
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