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Nearly 62 percent of respondents had at least one ACE and a quarter reported three or more. The remaining respondents had at least two ACEs, including 16 percent with four or more such experiences. Elva Etienne/Getty Images hide caption

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Elva Etienne/Getty Images

Neil deGrasse Tyson attends Film Independent at LACMA presents StarTalk — A Conversation with Astrophysicist Neil deGrasse Tyson, on June 5 in Los Angeles. Araya Diaz/Getty Images hide caption

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Araya Diaz/Getty Images

Megan Baker (left) of Papa & Barkley Co., a Cannabis company based in Eureka, Calif., shows Shirley Avedon of Laguna Woods different products intended to help with pain relief. Stephanie O'Neill for NPR hide caption

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Stephanie O'Neill for NPR

Ticket To Ride: Pot Sellers Put Seniors On The Canna-Bus

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A raccoon sitting on the stump of a tree in the Beaches in Toronto. The Toronto Star's Amy Dempsey thinks there's a particularly smart one in her neighborhood. David Cooper/Toronto Star via Getty Images hide caption

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David Cooper/Toronto Star via Getty Images

There's No Stopping Toronto's 'Uber-Raccoon'

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Rocky Flats National Wildlife Refuge sits on land surrounding the famous Rocky Flats Nuclear Reservation that produced nuclear weapons during the Cold War. Dan Boyce for NPR hide caption

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Dan Boyce for NPR

A New Wildlife Refuge On The Grounds Around An Old Nuclear Weapons Plant

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Candace and Lawanda Jones are taking shelter at Conway High School in Conway, S.C. John W. Poole/NPR hide caption

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John W. Poole/NPR

Florence Evacuees Face 4 Nights In A Shelter, And No End In Sight

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Spiez Laboratory is believed to have been involved with the analysis of chemical agents used in the U.K. It was allegedly targeted by Russian agents earlier this year. Fabrice Coffrini/AFP/Getty Images hide caption

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Fabrice Coffrini/AFP/Getty Images