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Article

Reefs in Crisis

Humans have harmlessly harvested coral reefs for thousands—or even hundreds of thousands—of years. So why has our behavior in recent years suddenly put reefs at risk?

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Article

Restoration of the Elwha River

In a single century, the salmon population of Washington State's Elwha River shrunk by more than 99 percent. What caused this dramatic decline, and what can be done to turn it around?

Curriculum Materials

Dinosaurs Alive Booklist for Adults

Meet the little dinosaurs of Ghost Ranch. Investigate evolution and the loss of flight in dinosaurs and birds. And dig deep into the lives of dinosaurs with these recommended reads.

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Climate Change: The Multiplier Effect

How much can you reduce your carbon dioxide emissions? Is it worth it? Learn how simple choices multiplied by everyone in your community can make a big difference.

Science Bulletin

GRACE: Tracking Water from Space

Watch how a unique dual-satellite mission called GRACE-NASA's Gravity and
Climate Experiment-is revealing an unprecedented view of our water planet.
For background information, educational resources and more, visit Grace:
Tracking Water from Space on the Science Bulletins website,
http://www.amnh.org/sciencebulletins/index.php?sid=e.f.GRACE.20090717.
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. This visualization
was supported by the National Oceanic and Atmospheric Administration
(NOAA).

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Article

Essay: Will Dark Energy Please Come to Light?

Two teams working independently in 1998 came to the same conclusion: An invisible force, one that seems to act opposite gravity, is separating the matter in space at an increasing pace. Find out more about their “jaw-dropping” discovery.

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Essay: Waiting for Gravity at LIGO

If LIGO regularly registers gravitational waves, it will more than vindicate Einstein. The observatory may help answer pressing questions about the cosmos’s biggest mysteries, among them black holes, dark matter, and the Big Bang.

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Essay: A Rogue's Gallery of Gravity-Makers

Anything with an accelerating mass has a gravitational effect — an atomic bomb, a spinning aircraft carrier, even you. Learn more about these ripples in space and how LIGO is designed to capture the biggest gravitational waves.

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