Latest Geological history of oxygen Stories
A University of Alberta-led research team has discovered that billions of years before life evolved in the oceans, thin layers of microbial matter in shallow water produced enough oxygen to support tiny, mobile life forms.
Danish-led scientists say an analysis of rock found only in the world's oldest oceans has shed light on how large animals obtained a foothold on Earth. The team led by University of Copenhagen Professor Robert Frei said it has, for the first time, plotted the rise and fall of oxygen levels in the Earth's atmosphere that occurred during the last 3.8 billion years. By analyzing the isotopes of chromium in iron-rich sediments formed in the ancient oceans, the team found a rise in atmospheric...
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