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How 311 Helped Understand Air Pollution After Harvey

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Black-footed ferrets are the most endangered mammal in North America. Scientists in Montana are trying to save the ferrets by saving their main food source, prairie dogs. Kathryn Scott Osler/Denver Post via Getty Images hide caption

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Kathryn Scott Osler/Denver Post via Getty Images

Biologists With Drones And Peanut Butter Pellets Are On A Mission To Help Ferrets

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China's ban means recycling is piling up at Rogue Waste System in southern Oregon. Employees Scott Fowler, Laura Leebrick and Garry Penning say their only option for now is to send it to a landfill. Jes Burns/OPB/EarthFix hide caption

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Jes Burns/OPB/EarthFix

Australia had a particularly hard flu season this year, which may predict similar challenges for the U.S. Pascal Pochard-Casabianca/AFP/Getty Images hide caption

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Pascal Pochard-Casabianca/AFP/Getty Images

In The U.S., Flu Season Could Be Unusually Harsh This Year

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Ben Anderson collects grass samples in Western Australia. Spinifex tastes to some like salt and vinegar chips — but it's so hard and spiky that scientists say collecting samples can be painful. Courtesy of Matt Barrett hide caption

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Courtesy of Matt Barrett

Wanda Irving holds her granddaughter, Soleil, in front of a portrait of Soleil's mother, Shalon, at her home in Sandy Springs, Ga. Wanda is raising Soleil since Shalon died of complications due to hypertension a few weeks after giving birth. Becky Harlan/NPR hide caption

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Becky Harlan/NPR

Black Mothers Keep Dying After Giving Birth. Shalon Irving's Story Explains Why

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I guess it's too late to change my mind. Aşkın Dursun KAMBEROĞLU/Getty Images hide caption

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Aşkın Dursun KAMBEROĞLU/Getty Images

Why Your Brain Has Trouble Bailing Out Of A Bad Plan

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Researchers found that when narwhals like these were released from a net, the animals' heart rates dropped even as they were swimming rapidly. Flip Nicklin/ Minden Pictures/Getty Images hide caption

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Flip Nicklin/ Minden Pictures/Getty Images

Stressed-Out Narwhals Don't Know Whether To Freeze Or Flee, Scientists Find

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Sales surged for guns, such as these seen at a show in Kenner, La., in late 2012, after the mass shooting in Newtown, Conn. Julie Dermansky/Corbis via Getty Images hide caption

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Julie Dermansky/Corbis via Getty Images
Katherine Streeter for NPR

Even Low-Dose Contraceptives Slightly Increase Breast Cancer Risk

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