Seismic wave data previously suggested the Earth’s hot inner core is slowing its spin. Now, researchers say it’s also ...

The surface of Earth's inner core appears to be dynamic, changing shape as it rotates, earthquake waves reveal.

With a radius of 3,959 miles, Earth is the fifth largest planet in our solar system, and it's the only one known for sure to have liquid water on its surface. Earth is also unique in terms of ...

the planet’s rusty red surface tells a story of destruction. Billions of years ago, the fourth planet from the sun could have been mistaken for Earth’s smaller twin, with liquid water on its ...

certain aspects of Earth's geology keep the plate tectonic engine chugging along. For a planet to sustain plate tectonics, it must have a convective mantle, Foley said. Cold, dense surface ...

Scientists have discovered a “super-Earth” planet ... in the zone means the planet, named HD 20794 d, is at the right distance from the star to sustain water on its surface, but because ...