A new analysis of rocks thought to be at least 2.5 billion years old helps clarify the chemical history of Earth's mantle -- the geologic layer beneath the planet's crust. The findings hone scientists ...

Evolution and geologic history reveal how life and Earth have changed over time. The National Academies explore fossil records, genetic evidence, and natural processes that shape our planet.

3. 25 Facts About Geologic Time That Made Our Brains Hurt 4. How Do We Know? A Glimpse into Geologic Sleuthing 5. Our Fleeting Moment in Deep Time 6. Frequently Asked Questions What if we told you ...

When we look at the solid ground beneath our feet, it’s easy to assume Earth has always been this way. But our planet tells a story so extraordinary, so filled with dramatic transformations and ...

The discovery could usher in a wave of investigations into the evolution of Earth’s mantle, a layer of material about 1,800 miles deep that extends from just beneath the planet’s thin crust to its ...

A new study traces a 120-million-year-old 'super-eruption' to its source, offering new insights into Earth's complex geological history. Geologists led by the University of Maryland and the University ...

New name reflects more than a century of evolution and a commitment to understanding the whole planet Beginning in August 2026, the University of Colorado Boulder's Department of Geological Sciences ...

Earth formed about 4.6 billion years ago, during the geological eon known as the Hadean. The name “Hadean” comes from the Greek god of the underworld, reflecting the extreme heat that likely ...

The Singhbhum Craton in eastern India represents one of the world’s most enduring fragments of Archaean continental crust, with a history extending back more than 4.0 billion years. Its nucleus ...

A thin slice of the ancient rocks collected from Gakkel Ridge near the North Pole, photographed under a microscope and seen under cross-polarized light. Field width ~ 14mm. Analyzing rocks in thin ...