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Grades 9-12

Moving Mountains

Science Bulletin

Moving Mountains

One paradox of geology is that weathering a mountain down can actually make it rise higher. Scientists have learned of this peculiar feedback process only in recent years, and the St. Elias Erosion/tectonics Project (STEEP) team is at the forefront of understanding how climate and the movements of Earth's crust interact to build towering peaks. In this feature video, meet geologists of every stripe collaborating on STEEP in Alaska's St. Elias Range, one of the most rapidly growing mountain ranges in the world.
To orient yourself to this obscure yet spectacular locale, click "Explore the St. Elias Range" at left. Read more about the science behind the paradigm shift in the essay A Mountain Theory on the Rise.

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Science Bulletin

Zircons: Time Capsules from the Early Earth

Zircons are tiny crystals with a big story to tell. Some of these minerals are the oldest Earth materials ever discovered, and therefore yield clues about what the planet was like after it formed 4.5 billion years ago. In this new Science Bulletins video, travel to a remote island off Greenland's coast and a zircon-making lab in New York State to learn how geologists are using these time capsules to build new hypotheses about the early Earth.
Science Bulletins is a production of the National Center for Science Literacy, Education, and Technology (NCSLET), part of the Department of Education at the American Museum of Natural History. Each Bulletin is produced by AMNHs curatorial and scientific staff and a team of video producers, designers, writers, and educators using state-of-the-art technologies such as high-definition video, data visualization, and 3-D computer graphics to present the latest research.

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