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Using the coda waves from earthquakes, geologists have discovered that our planet's core isn't quite what we thought it was.
One of the 20th century's leading seismologists was a Danish woman who transformed our understanding of one of Earth's deepest mysteries.
It's a real-life mystery cliffhanger. We've come up with a list of possible reasons a large crater on the biggest object in the asteroid belt looks lit up like a Christmas tree.
A pretty bit of blue zircon dating back billions of years to the formation of the Earth's crust may be one of the oldest pieces of the planet.
Scientists have taken new measurements that suggest that the core of the Earth burns at 6000 degrees Celsius — as hot as the surface of the sun.
The rare and colorful lights sometimes seen before major earthquakes could come from electric charges in certain types of rock.
NASA's Mars Atmosphere and Volatile Evolution -- MAVEN -- spacecraft starts a 10-month voyage to the Red Planet to study how the martian atmosphere has changed over time.
Moments after exploding with the energy of an atomic bomb in the skies over the city of Chelyabinsk, the space rock quietly let itself into a lake outside of town, not far from the watchful eye of a security camera.
Lawmakers on the island of Grenada are tired of online "mischief." So they've banned it. How might this affect the nation's discourse?
How are these unusual minerals extracted from the ground and why is that process an environmental risk? CNET's Jay Greene explains.