Hazy shades of life on early Earth
A 'see-sawing' atmosphere over 2.5 billion years ago preceded the oxygenation of our planet and the development of complex life on Earth, a new study has shown.
Earth Sciences
Mar 18, 2012
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Page 14 - News tagged with atmospheric oxygen
Researchers discover how colliding oxygen molecules absorb light
Scientists at Radboud University have managed to do what had never been tried before: accurately describe how colliding oxygen molecules absorb light. Our atmosphere consists of approximately 20 percent oxygen molecules, ...
Materials Science
Apr 10, 2018
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Algae for your fuel tank: New process for producing biodiesel from microalgae oil
The available amount of fossil fuels is limited and their combustion in vehicle motors increases atmospheric carbon dioxide levels. The generation of fuels from biomass as an alternative is on the rise. In the journal Angewandte ...
Materials Science
Jan 10, 2012
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Oxygen linked with the boom and bust of early animal evolution
Extreme fluctuations in atmospheric oxygen levels corresponded with evolutionary surges and extinctions in animal biodiversity during the Cambrian explosion, finds new study led by UCL and the University of Leeds.
Earth Sciences
May 6, 2019
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Water could disappear from Mars faster than expected
Mars is losing water more quickly than theory and observations would suggest. The gradual disappearance of water (H2O) occurs in the upper atmosphere of Mars as sunlight and chemistry disassociate water molecules into hydrogen ...
Space Exploration
Jan 9, 2020
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Scientists probe Canadian sulfide ore to confirm microbial activity in seawater 2.7 billion years ago
An analysis of sulfide ore deposits from one of the world's richest base-metal mines confirms that oxygen levels were extremely low on Earth 2.7 billion years ago, but also shows that microbes were actively feeding on sulfate ...
Earth Sciences
Dec 10, 2012
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Oxygen was present in the atmosphere much earlier than previously assumed
Reconstructing the emergence and evolution of life on our planet is tightly linked to the questions as to when and to what extent Earth's atmosphere became oxygenated. New geological studies based on data from Western Greenland ...
Earth Sciences
Feb 16, 2016
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The ups and downs of early atmospheric oxygen
A team of biogeochemists at the University of California, Riverside, give us a nontraditional way of thinking about the earliest accumulation of oxygen in the atmosphere, arguably the most important biological event in Earth ...
Earth Sciences
Feb 19, 2014
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Jupiter's magnetosphere knocking molecules from ice on surface of Callisto does not explain amount of atmospheric oxygen
A team of scientists affiliated with several institutions in the U.S. has tested a theory created to explain the amount of oxygen in the atmosphere of Callisto, one of Jupiter's moons, and has found that it falls short. In ...
Astronomers suggest new telescopes could detect biomarker gasses in exoplanet atmospheres
(Phys.org)—Astronomers in the Netherlands write in a paper published in The Astrophysical Journal, that construction of new ground based telescopes could allow for discerning if small exoplanets have biomarker gasses in ...
