Giant regions of the mantle where seismic waves slow down may have formed from subducted ocean crust, a new study finds.

What’s the world record for deepest vertical dig? Go ahead, take a guess. We bet you won’t come close to the surprising answer unearthed in this one-minute video by Ask Smithsonian host ...

Seismic waves suggest the planet's solid inner core is being pulled out of shape – and it has undergone these changes over just a few decades ...

Debris produced by human activity has now been spotted at a depth of 5,112 meters (3.2 miles) in the Mediterranean Sea.

If we could drill deep enough, we could put geothermal power stations just about anywhere we wanted them. But that's harder than it sounds. The Earth's crust varies in thickness from about 5 to 75 ...

Deep beneath Earth’s surface ... “When there is a big earthquake, the whole Earth will expand and contract like a bell,” Deuss explained in an interview with New Scientist.

Following is a transcript of the video. Narrator: The Mariana Trench is the deepest point on Earth. So deep that if you dropped Mount Everest inside, its peak would still be more than a kilometer ...

Examining these organisms can give scientists information about how life originated on Earth and the potential for life elsewhere in the universe. Challenger Deep is not just a natural phenomenon ...

Making the mission a milestone for both China and space exploration as a whole ... And it's a whopping 8 km deep — for comparison, the deepest natural point on Earth, the Challenger Deep ...