Journey to the Center of Earth

Happy Birthday to Inge Lehmann, the Woman Who Discovered Earth's Inner Core

Pioneering geologist used earthquakes to unravel the mystory of the Earth’s core

The Grand Prismatic Spring is one of the most indelible hydrothermal features in Yellowstone National Park.

Giant New Magma Reservoir Found Beneath Yellowstone

While an eruption is still unlikely, the find improves our understanding of the supervolcano underneath the national park

Scientists use underwater vehicles like these to study eruptions beneath the surface.

This is What An Underwater Volcano Sounds Like

Decoding the noises of magma and bubbles will help scientists study explosions from afar

Yum! A candy-colored view of the planet Mercury shows differences in its chemical makeup.

Earth May Have Become Magnetic After Eating a Mercury-Like Object

Swallowing a sulfur-rich protoplanet could help explain two lingering mysteries in the story of Earth's formation

The 1815 eruption of Mount Tambora in Indonesia left a huge crater, along with a sometimes unexpected legacy.

200 Years After Tambora, Some Unusual Effects Linger

Frankenstein, famine poetry, polar exploration—the "year without a summer" was just the beginning

Cavers stand amongst large gour pool walls and unique raft cone formations inside Hang Va.

These Breathtaking Photos of Vietnam’s Caves Bring Out the Armchair Spelunker in Everyone

Photographer Ryan Deboodt discovers beauty in this subterranean realm

An artist's rendition of an asteroid impact.

Largest Asteroid Crater Ever Discovered Underground in Australia

Deep in Earth’s mantle, scientists find evidence of a colossal impact that could reveal new information about Earth’s history


Ask Smithsonian: What's the Deepest Hole Ever Dug?

The answer to the question, says a Smithsonian researcher, is more about why we dig, than how low you can go

Earth's layers.

What We Can Learn by Digging Up the Secrets of Earth's Deep Carbon

Diamond computers and subsurface life are just some of the topics being investigated by scientists in the Deep Carbon Observatory network

There May Be a Second Massive Ocean Deep Beneath the Surface

Chemically bonded to minerals in the transition zone, Earth's mantle may be rather wet

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