Wikipedia
Life before oxygen
Hazy shades of life on Earth
The transitiont of Earth's atmosphere to being oxygen-rich:
Rethinking early atmospheric oxygen
A stepping-stone for oxygen on Earth
A new constraint on the rise of oxygen
New constraints on early oxygen levels
Ancient soils reveal clues to early life on Earth
New and old ideas about Earth's oxygen history
The ups and downs of early atmospheric oxygen
Earth's breathable atmosphere tied to plate tectonics?
Geological record shows air up there came from below
Oxygen's ups and downs in the early atmosphere and ocean
Oxygen oasis in Antarctica lake reflects Earth in the distant past
New answer as to why Earth's atmosphere became oxygenated
Researchers identify molecular 'culprit' in rise of planetary oxygen
Iron-silica particles unlock part of the mystery of Earth's oxygenation
Geoscientists find new fallout from the 'collision that changed the world'
Variations in atmospheric oxygen levels shaped Earth's climate through ages
Oxygen was present in the atmosphere much earlier than previously assumed
Earth's breathable atmosphere a result of continents taking control of the carbon cycle
Oxygen levels on early Earth rose and fell several times before the successful Great Oxygenation Event
The link between oxygen and the rise of life on Earth:
More oxygen through multicellularity
Antarctic microbes hold clue to Earth's oxygen
Geologists re-write Earth's evolutionary history book
Global warming disaster could suffocate life on planet Earth
Plankton key to origin of Earth's first breathable atmosphere
Complex animals led to more oxygen, says maverick theory
Oxygen linked with the boom and bust of early animal evolution
A whiff from blue-green algae likely responsible for Earth's oxygen
Burrowing animals may have been key to stabilizing Earth's oxygen
Rapid oxygen changes fueled an explosion in ancient animal diversity
Researchers find origin of 'breathable' atmoshere 0.5 billion years ago
Laughing gas may have helped warm early Earth and given breath of life
Low level of oxygen in Earth's middle ages delayed evolution for two billion years
Oxygen accumulated in Earth's primordial oceans 250 million years before the atmosphere