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

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

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

About a billion years ago, Earth started to come into its own. It was past the awkwardness of its younger years full of ...

Add Yahoo as a preferred source to see more of our stories on Google. Ancient glaciers reshaped Earth’s surface and shifted ocean chemistry, fueling the rise of complex life, a new study found. Calved ...

Seagrass fossils show ancient meadows moved toward the poles during warm periods, offering clues for today’s warming oceans.

Add Yahoo as a preferred source to see more of our stories on Google. The Earth: a ringed planet, much like Saturn, surrounded by a hula hoop of asteroids. The summit of Mount Everest: a tropical, ...

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 ...

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The discovery of polystrate fossils has sparked debate over their implications for the biblical flood narrative.