Oxygen is abundant on Earth. It's actually the third most plentiful element in the entire universe, behind hydrogen and helium. Yet the further you get from our home planet, the less oxygen there ...

Two substances, one a mineral, the other a product of manufacture —peroxide of manganese and chlorate of potash—have ordinarily been the source of oxygen ; this gas can be evolved from them ...

“Because these fields cover such huge areas of our planet it would be crazy to press ahead with deep-sea mining knowing they may be a significant source of oxygen production.” Prof Sweetman ...

But this study shows that rich-nodules on the seafloor may have provided an additional source of oxygen to the biosphere—the zone of life on Earth encompassing all living organisms. We can't ...