Joe Palca (left) with Jim Allison (second from right) and friends, circa 1975. Allison has gone on to make landmark discoveries in science, and is still passionate about outlaw country music. Joe Palca/NPR hide caption

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Joe Palca/NPR

Nina Rossi, left, befriended Lance Rice, a recovering addict, after he robbed her house in 2013. Since last year, when this photo was taken, Rice had a relapse and a rift developed between the two. Karen Brown/WFCR hide caption

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Karen Brown/WFCR

Addiction Takes A Toll On An Unlikely Friendship

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Laury Sacks and her husband, Eric. The actress and writer developed frontotemporal dementia in her late 40s and died in 2008 at age 52. Courtesy of Eric Sacks hide caption

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Courtesy of Eric Sacks
Oivind Hovland/Ikon Images/Corbis

Do We Choose Our Friends Because They Share Our Genes?

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