A vast reservoir of the rare gas helium-3 may be hanging out in Earth's metallic core.
One of Earth's two mysterious mantle blobs is much higher than the other, raising questions about its impact on Earth's surface.
A collision with a Mars-size planet 4.5 billion years ago may have left a permanent impact on our planet's deep mantle.
The mysterious presence of mantle materials more than 1,000 miles (1,609 km) from where they originated may be explained by a 'window' 62 miles (100 kilometers) below the Earth's surface.
New seismic models show that Earth's inner core may be growing faster in the east than in the west, creating a 'lopsided' pattern at the center of our planet.
Using thousands of seismic wave recordings, researchers mapped the mysterious 'blobs' deep below the Pacific Ocean and found they are even bigger than imagined.
An underwater plateau near New Zealand was likely created by the 'largest volcanic outpouring' in Earth's history, a new study suggests.
An International team of scientists finds evidence that Earth began recycling itself more than 3 billion years ago.
Here’s one explanation for why Earth’s magnetic field undergoes weird geomagnetic jerks every decade or so.
A slippery layer beneath Earth stops chunks of crust in their tracks, creating "stagnant slabs" in the middle of the mantle.
Rocks from the eastern shore of the Hudson Bay in Canada contain elements of some of Earth's earliest crust, new research finds.
The Earth's mantle retains traces of primeval materials that are older than the moon, which formed a scant 100 million years after the solar system's coalescence.
Scientists trying to determine where the missing heat from the Earth comes from have turned to an unlikely source: a microwave oven.