A representation of the underground imaging used in the study. (Edward Garnero and Mingming Li/Arizona State University) The ...

Ancient Greeks made many impressive astronomical discoveries, including when Eratosthenes calculated the circumference of the ...

"During the Late Cretaceous, atmospheric CO2 levels reached about 1,000 parts per million — comparable to projections for the ...

Ancient rocks in Australia suggest Earth’s tectonic plates were already moving 3.5 billion years ago, reshaping understanding ...

For decades, geologists labeled a billion-year stretch of Earth’s history—from 1.8 to 0.8 billion years ago—as the “Boring Billion.” They assumed not much occurred during the time: mountain building ...

A new study analyzed how NASA's Habitable Worlds Observatory might be able to confidently spot biosignatures in the ...

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A team of researchers has made strides in understanding the formation of massif-type anorthosites, enigmatic rocks that only formed during the middle part of Earth's history. These plagioclase-rich ...

Earth's 19-hour days: the mystery of ancient Earth's slow spin ...

Scientists have discovered the "fossilized fingerprint" of a chunk of seafloor that was hiding beneath the Pacific Ocean in Earth's mantle. A new study shows that this fingerprint corresponds to a ...

One of the most devastating extinctions in Earth's history is best known for what didn't die—dinosaurs. But the end-Triassic ...