Scientists have long debated how much molecular oxygen was in Earth's early atmosphere. About 2.4 billion years ago, there was a rise in oxygen that transformed Earth's atmosphere and biosphere, eventually making life like ...
Earth Sciences
Sep 30, 2021
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The Earth has been through a lot of changes in its 4.5 billion year history, including a shift to start incorporating and retaining volatile compounds from the atmosphere in the mantle before spewing them out again through ...
Earth Sciences
Aug 8, 2018
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Earth's oxygen levels rose and fell more than once hundreds of millions of years before the planetwide success of the Great Oxidation Event about 2.4 billion years ago, new research from the University of Washington shows.
Earth Sciences
Jul 9, 2018
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A 2-billion-year-old chunk of sea salt provides new evidence for the transformation of Earth's atmosphere into an oxygenated environment capable of supporting life as we know it.
Earth Sciences
Mar 22, 2018
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378
More than 2.4 billion years ago, Earth's atmosphere was inhospitable, filled with toxic gases that drove wildly fluctuating surface temperatures. Understanding how today's world of mild climates and breathable air took shape ...
Earth Sciences
Mar 13, 2017
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Somewhere between Earth's creation and where we are today, scientists have demonstrated that some early life forms existed just fine without any oxygen.
Earth Sciences
Nov 29, 2016
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(Phys.org)—An international team of scientists has discovered the greatest absence of evolution ever reported—a type of deep-sea microorganism that appears not to have evolved over more than 2 billion years. But the researchers ...
Earth Sciences
Feb 3, 2015
106
4617
(Phys.org) —A small team of researchers with the University of California has found a way break apart carbon dioxide molecules and get carbon atoms and oxygen molecules instead of carbon monoxide and an oxygen atom. In ...
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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The oldest evidence of photosynthetic structures reported to date has been identified inside a collection of 1.75-billion-year-old microfossils, a Nature paper reveals. The discovery helps to shed light on the evolution of ...
Evolution
Jan 4, 2024
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