Did nature have a hand in the formation of the Great Sphinx?

Historians and archaeologists have, over centuries, explored the mysteries behind the Great Sphinx of Giza: What did it originally look like? What was it designed to represent? What was its original name? But less attention ...

Earth's oldest-known rocks provide clues about early tectonics

Earth is currently the only planet known to harbor life—thanks in large part due to the operation of plate tectonics, which cycles critical biogeochemical elements and maintains a planetary thermostat. Subduction—the ...

Remains of an extinct world of organisms discovered

Newly discovered biomarker signatures point to a whole range of previously unknown organisms that dominated complex life on Earth about a billion years ago. They differed from complex eukaryotic life as we know it, such as ...

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