what did we breathe before oxygen was discovered ?

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https://www.livescience.com/life-on-earth-before-oxygen.html

https://www.livescience.com/life-on-earth-before-oxygen.html
We may finally know what life on Earth breathed before there was oxygen …
In Chile’s Atacama Desert, in a place called Laguna La Brava, scientists have been studying a purple ribbon of photosynthetic microbes living in a hypersaline lake that’s permanently free of…

https://www.futurity.org/life-on-earth-before-the-rise-of-oxygen

https://www.futurity.org/life-on-earth-before-the-rise-of-oxygen
Life on Earth before the rise of oxygen – Futurity
Now, a team led by geobiologists at the California Institute of Technology (Caltech) has found evidence of a precursor photosystem involving manganese that predates cyanobacteria, the first group…

https://www.livescience.com / 44308-first-oxygen-breathers-on-earth.html

https://www.livescience.com / 44308-first-oxygen-breathers-on-earth.html
When Did Earth’s First Whiffs of Oxygen Emerge? | Live Science
Emerging evidence suggests oxygen levels took a roller coaster ride in the 500 million years between when the first cyanobacteria evolved photosynthesis and the Great Oxidation Event. That’s a …

https://eos.org/articles/how-did-life-learn-to-breathe

https://eos.org/articles/how-did-life-learn-to-breathe
How Did Life Learn to Breathe? – Eos
Life respired other things, like nitrous oxide, before oxygen. What factors opened the door for this evolution? The answers have been hazy, but in new research, geoscientists may have…

https://www.scientificamerican.com/article/origin-of-oxygen-in-atmosphere

https://www.scientificamerican.com/article/origin-of-oxygen-in-atmosphere
The Origin of Oxygen in Earth’s Atmosphere – Scientific American
At roughly the same time (and for eons thereafter), oxidized iron began to appear in ancient soils and bands of iron were deposited on the seafloor, a product of reactions with oxygen in the …

https://www.mentalfloss.com/article/31358/discovering-oxygen-brief-history

https://www.mentalfloss.com/article/31358/discovering-oxygen-brief-history
Discovering Oxygen: A Brief History | Mental Floss
Contender 1: Carl Wilhelm Scheele. Biggest Accomplishment: In 1772, he was the first person to figure out a way – actually a couple of ways – to isolate oxygen. He discovered that mercuric oxide …

https://www.britannica.com/science/oxygen

https://www.britannica.com/science/oxygen
Oxygen | Discovery, Symbol, Properties, Uses, & Facts
27 nov. 2023History. Oxygen was discovered about 1772 by a Swedish chemist, Carl Wilhelm Scheele, who obtained it by heating potassium nitrate, mercuric oxide, and many other substances.An English chemist, Joseph Priestley, independently discovered oxygen in 1774 by the thermal decomposition of mercuric oxide and published his findings the same year, three years before Scheele published.

https://en.wikipedia.org/wiki/Geological_history_of_oxygen

https://en.wikipedia.org/wiki/Geological_history_of_oxygen
Geological history of oxygen – Wikipedia
Before the Great Oxidation Event. Photosynthetic prokaryotic organisms that produced O 2 as a waste product lived long before the first build-up of free oxygen in the atmosphere, perhaps as early as 3.5 billion years ago. The oxygen they produced would have been rapidly removed from the oceans by weathering of reducing minerals, [citation needed] most notably iron.

https://www.acs.org/education/whatischemistry/landmarks/josephpriestleyoxygen.html

https://www.acs.org/education/whatischemistry/landmarks/josephpriestleyoxygen.html
Joseph Priestley and the Discovery of Oxygen – American Chemical Society
The world recalls Priestley best as the man who discovered oxygen, the active ingredient in our planet’s atmosphere. In the process, he helped dethrone an idea that dominated science for 23 uninterrupted centuries: Few concepts have laid firmer hold upon the mind, he wrote, than that air is a simple elementary substance, indestructible and …

https://www.science.org/content/article/how-early-was-oxygens-rise

https://www.science.org/content/article/how-early-was-oxygens-rise
How Early Was Oxygen’s Rise? | Science | AAAS
Some researchers had long argued for oxygen’s early arrival well before 3 billion years ago, but in 2000, geochemist James Farquhar of the University of Maryland, College Park, came up with a nifty technique involving sulfur isotopes that nailed the oxidation event at 2.4 billion years. The proportion of different isotopes of the same element … lesoutrali bot