A new study out this week said that the Earth's inner core is less solid than previously thought. Scientists still have questions, though.

Above the inner core is the outer core ... the two lies about 465 miles (750 kilometers) beneath the Earth's surface. The crust is the outermost layer of the Earth. It is the familiar landscape ...

Scientists of course cannot cut into Earth and directly observe its insides. Instead, their knowledge is inferred from the ...

Discover interesting facts about how big earthquakes can get, why earthquakes happen, and why they're so hard to predict.

The Earth has a layered structure made up of the core, the mantle and the crust. Different elements are present in different parts of the Earth’s structure. The crust is made from enormous ...

Axial Seamount doesn’t pose a threat to humans, but observing what happens before and after its potential eruption could help scientists learn about submerged volcanoes and strengthen ...

The ocean plate was once the seafloor of Neotethys — an ocean that formed when the supercontinent Pangaea broke up into a ...