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A sign advertising a water sale sits on a farm outside Del Norte, Colorado. Luke Runyon/KUNC hide caption

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Luke Runyon/KUNC

To Save Their Water Supply, Colorado Farmers Taxed Themselves

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The core of the RBT-3 reactor at the Research Institute of Atomic Reactors in Dimitrovgrad, Russia. Some scientists suspect the institute's work on medical isotopes might explain radioactivity detected over Europe. Sovfoto/UIG via Getty Images hide caption

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Sovfoto/UIG via Getty Images

Mileha Soneji speaks at TEDxDelft 2015. TEDxDelft hide caption

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TEDxDelft

Mileha Soneji: Can Simple Innovations Improve The Lives of Parkinson's Patients?

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Amos Winter's Leveraged Freedom Chair. Courtesy of GRIT hide caption

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Courtesy of GRIT

Amos Winter: How Do You Build An All-Terrain Wheelchair For Under $200?

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The Centers for Medicare and Medicaid Services — and its controversial center for innovation — is part of the U.S. Department of Health and Human Services, and has its headquarters outside D.C., in Woodlawn, Md. Jay Mallin/Bloomberg via Getty Images hide caption

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Jay Mallin/Bloomberg via Getty Images

Grapes have been growing along the steep slopes of Germany's Mosel River for centuries. Now global warming is shifting the timing of the harvest. Daniella Cheslow for NPR hide caption

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Daniella Cheslow for NPR

Climate Change Ripens Prospects For German Winemakers

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A technician examines the mirror on the Large Synoptic Survey Telescope. Scientists at two national laboratories are currently building the components for an enormous digital camera that will capture images from the telescope. Joe McNally/Getty Images hide caption

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Joe McNally/Getty Images

The Largest Digital Camera In The World Takes Shape

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Martha (right), the last known passenger pigeon, died in 1914. Her preserved body is now on display at the Smithsonian's National Museum of Natural History in Washington, D.C. Susan Walsh/AP hide caption

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Susan Walsh/AP

Why Did The Passenger Pigeon Go Extinct? The Answer Might Lie In Their Toes

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Climate conference attendees in Bonn, Germany, see a representation of Earth's climate trends. Ulrich Baumgarten/Getty Images hide caption

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Ulrich Baumgarten/Getty Images

As Climate Negotiators Debate Nations' Pledges, Scientists Worry It's Not Enough

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A farmer plows his field with an ox-pulled plow in China's Guangxi province. Archaeologists think that domesticated farm animals increased inequality in some ancient societies. Peter Parks/AFP/Getty Images hide caption

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Peter Parks/AFP/Getty Images

From Cattle To Capital: How Agriculture Bred Ancient Inequality

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