News tagged with atmospheric oxygen

The rise and fall of oxygen

How long has Earth's atmosphere included oxygen? A recent paper suggests low levels of oxygen appeared in the atmosphere approximately 2.95 billion years ago. That's about 550 million years earlier than previously thought.

dateDec 11, 2013 in Earth Sciences
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Could dying planets harbor life?

If life does exist anywhere else in the universe, it may only be fleeting. Now scientists are researching how signs of life might look on dying planets.

dateNov 25, 2013 in Astronomy
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A designer enzyme for alternative energy

(Phys.org) —Imagine pulling energy out of thin air. Yi Lu and his colleagues are on that path, in a quest to find alternatives to fossil fuels. The team has designed an enzyme that can harvest the energy of atmospheric ...

dateJun 21, 2013 in Biochemistry
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Testing artificial photosynthesis

(Phys.org) —With the daily mean concentrations of atmospheric carbon dioxide having reached 400 parts-per-million for the first time in human history, the need for carbon-neutral alternatives to fossil fuel energy has never ...

dateJun 10, 2013 in Materials Science
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