A number of hypotheses have been used to explain how free oxygen first accumulated in Earth’s atmosphere some 2.4 billion years ago, but a full understanding has proven elusive. Now a new model offers ...
The Amazon rainforest is often called the “lungs of the Earth” and credited with producing some 20 percent of the world’s ...
The Great Oxygenation Event, which occurred around 2.4 billion years ago, was one of the biggest transformations of our planet. Before it, there was practically no oxygen in the atmosphere; after, ...
A switch from predominantly undersea volcanoes to a mix of undersea and terrestrial ones shifted the Earth’s atmosphere from devoid of oxygen to one with free oxygen, according to geologists. “The ...
New research shows ancient tropical oceans once held more oxygen than cooler regions, reshaping where early life could ...
Elizabeth Swanner receives funding from the U.S. National Science Foundation and the National Aeronautics and Space Administration. Little Deming Lake doesn’t get much notice from visitors to Itasca ...
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