The idea of a hollow Earth has fascinated people for centuries. Some have imagined a giant empty world beneath our feet, ...

The Earth is four and a half billion years old, so why they started appearing then is unknown, as is the mechanism to make ...

PCWorld reports that scientists discovered Earth’s inner core has slowed its rotation relative to the crust, even appearing to stop moving in a phenomenon that occurs every 35 years. This iron-nickel ...

A surprising reversal in molten iron flow beneath the Pacific is giving scientists a sharper view of how Earth’s magnetic ...

A huge region of molten iron deep beneath the Pacific Ocean suddenly changed direction around 2010. The discovery suggests ...

All the activity on Earth’s surface — erupting volcanoes, shifting tectonic plates, restless seas and myriad forms of life — depends on the two-part engine under the hood. Directly beneath Earth’s ...

Add Yahoo as a preferred source to see more of our stories on Google. A representation of the underground imaging used in the study. (Edward Garnero and Mingming Li/Arizona State University) The ...

The formation of continents was an important step in Earth’s history. Continents and plate tectonics are connected to the planet’s habitability, and the same is true for the habitability of other ...

Scientists have discovered that seismic waves traveling to Earth’s core and back caused almost all of Japan to shift eastward ...

Researchers at Göttingen University have uncovered new evidence that some of Earth's most precious metals began their journey far deeper than once thought. Working with volcanic rocks from ocean ...

Picture all of Earth’s oceans, which cover about 70% of the planet and are mostly made of hydrogen. Now multiply that by nine. That may be the amount of hydrogen in Earth’s core, possibly making it ...

Earth, our home planet, is a world unlike any other. The third planet from the sun, Earth is the only place in the known universe confirmed to host life. With a radius of 3,959 miles, Earth is the ...