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oxygen
Earth Sciences
Oxygen jump link to species spread
Earth Sciences
Rocks, not bacteria, triggered Earth’s oxidation
Climate
Oxygen-starved oceans can take a million years to recover
Space
Why comets have oxygen atmospheres
Biology
How naked mole rats survive without oxygen
Biology
Bacteria’s evolution sheds light
Space
Earth has peppered the moon with oxygen for billions of years
Space
Cosmic 'blob' divulges supermassive black hole's violent past
Space
Why is Mars red?
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