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Grades 9-12

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Article

Article: Follow the Magma

In 1669, the fastest and largest lava flow documented for Mount Etna on the island of Sicily killed most of Catania's 20,000 residents and destroyed much of the city. Why are scientists now watching Etna more than any other volcano in Europe? Find out.

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Article

The Ice Plant Cometh

During a July 2004 project to drill an ice core from the top of Peru's Andes Mountain, the lead researcher took a detour… and made a discovery with profound implications. Learn more.

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Article

Expedition for an Ice Core

By analyzing the relics glaciers hold — compacted snow and trapped air from ancient atmospheres, ash from long-quiet volcanoes, dust, insects, and pollen — scientists can reconstruct hundreds of thousands of years of Earth’s climate.

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Article

The Coming and Going of an Ice Age

In the past two million years alone, Earth has experienced around 20 ice ages — cycles of advance and retreat of large continental ice sheets. When is the next one due? And will global warming change that due date?

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Article

Rapid Change in a Warming World

Climate change isn’t always slow, small, and imperceptible in a human lifetime. Ice core analysis has found a single decade in which temperatures over Greenland shot up about 15 degrees Celsius.

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Article

The Climate Jump Heard 'Round The World

Scientists know that the unusual and rapid temperature jump of the Younger Dryas was felt over half the globe. But they're only now beginning to understand why.

Interactive

Interactive: Watch a Glacier Melt

Qori Kalis is the largest outlet glacier of Peru's Quelccaya ice cap. See firsthand how it (like all tropical glacier ice) is melting because of global warming.

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Article

NAO Who?

Name any debacle of nature, and someone will likely blame it on El Niño. But there’s another large-scale climate pattern that's been overlooked: El Niño's fickle Nordic sister, the North Atlantic Oscillation.

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Article, Science Bulletins

Essay: Chasing Invaders on a Water Planet

Water bodies on our planet form a network, which aquatic species migrate over evolutionary time as needed or by accident. Find out how Homo sapiens have dramatically changed and accelerated this process.

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Article

How NAO Does Its Thing

Find out how each NAO phase spins its particular brand of atmospheric tumult, affecting temperature, precipitation, cloudiness, and windiness in different regions — sometimes to drastic ends.

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