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Treasures Metals Eiffel Tower

An excerpt from "Treasures of the Earth: Metals"
Stromatolites Were Kings

When the sand is swept away the stromatolites are vulnerable to the seaweeds.
Beyond the Elements: Reactions (with Audio Description)

Discover the fascinating chemistry that makes our world and everything in it—including us.
Secrets of the Sky Tombs

Evidence discovered in the world’s highest tombs reveals ancient rituals and beliefs.
Animal Mummies

How and why did the ancient Egyptians mummify their pets and other creatures?
From Mud to Rock

It’s the tough Manhattan schist rock that’s allowed the city’s skyscrapers to soar.
Finding Stromatolites

We’re looking for one of the oldest organisms on our planet.
Front Row Seat to Saturn

Out near Saturn, the spacecraft Cassini has just entered its final and riskiest chapter.
Lethal Seas Excerpt 1

Lethal Seas Excerpt 1
Grand Canyon 4

This video explores the Grand Canyon.

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