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Article: Zircons Recast Earth's Earliest Era

Rocks older than 4 billion years are not available to study, making the first 500 million years of Earth's history particularly mysterious. But cutting-edge techniques are now allowing geologists to study survivors of Earth's early era.

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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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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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NAO Data Hunting (and Gathering)

From the chilly depths of the Atlantic to ancient European forests, researchers are combing for data to explain the NAO's mysteries.

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Forecasting the Unpredictable

Northern Hemispheric temperatures are now at their steamiest. Discover why scientists are concerned about global warming's potential backlash on the NAO.

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Article: An Ode to O

Where would the world be without oxygen? While it's hard to imagine an Earth without it, for nearly the first half of the planet's 4.5-billion-year history, Earth had no oxygen gas as part of its atmosphere.

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Article: Earth Without Oxygen

Where would the world be without oxygen? While it's hard to imagine an Earth without it, for nearly the first half of the planet's 4.5-billion-year history, Earth had no oxygen gas as part of its atmosphere.

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Article: Life Makes a Mark

One of the biggest forces that's shaped planet Earth over time is microscopic in size. Explore the global impact of microbes.

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Biogeography Begets Biodiversity

Discover how the geological and climatic changes that have unfolded over millions of years in Vietnam have set the stage for an extraordinary richness of biodiversity.

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