The Brain-Food Fix

1. Famous Tumors

When we first released Famous Tumors, Rebecca Skloot's book about the life and legacy of Henrietta Lacks (and her famous cells) had just hit the shelves. Since then, some interesting things have happened to both Henrietta's cells and her family. So, 4 years later, we have a newly updated show!

2. Why Bad Environmentalism Is Such an Easy Sell

Being green is rarely a black-and-white issue -- but that doesn't stop marketers and politicians from pretending it is.

3. '12 Years A Slave' Was A Film That 'No One Was Making'

Director Steve McQueen tells Fresh Air's Terry Gross that he wanted to help fill a "huge hole in the canon of cinema." And actor Chiwetel Ejiofor, whose parents are from Nigeria, says he grew up feeling "a sense of unity amongst African people and people of African heritage."

4. Botched Investigation Fuels Kennedy Conspiracy Theories

It's been 50 years since President John F. Kennedy was assassinated, and polls show that a majority of Americans still believe Kennedy was the victim of a conspiracy, not a lone assassin. Philip Shenon, author of A Cruel and Shocking Act, explores what keeps these conspiracy theories alive.

5. M. Erb's Amazon Empire

We recently became obsessed with a strange, select club: The top rated reviewers on Amazon. These are ordinary people, not Amazon employees, who write and record hundreds of astonishingly detailed reviews on Amazon.At this moment, Amazon's number 1 reviewer is Michael Erb (Amazon screen name, M. Erb). He's has reviewed more than 850 products, ranging from telescopes to facial wipes. On today's show, we talk to Erb and another top reviewer, and we try to figure out: Why do they spend so much time and effort reviewing stuff on Amazon?

6. The Anti-Addiction Pill That's Big Business For Drug Dealers

There's a pill called Suboxone that treats addiction to heroin and pain pills like oxycontin. Doctors and addicts say it's amazing."It was the best thing that ever happened," one heroin addict told us. "I was like OH. MY. LORD. This is a miracle pill."The government spent tens of millions of dollars developing Suboxone. Doctors can prescribe it in their offices. But a lot of people who want it can't get it from a doctor, so they have to buy it on the street.Today on the show: Why people have to turn to drug dealers to get a pill that fights addiction.

7. Unhooked

A man travels to Europe right around the fall of The Berlin Wall.

8. Turning Points

Our lives are often defined by turning points. They can happen gradually or in an instant. But how do we reconcile the before and the after — our former selves with who we've become? In this hour, we hear from TED speakers who have been shaped by profound turning points in their lives. Surgeon and author Sherwin Nuland recalls how he broke free of a debilitating depression after undergoing electroshock therapy. Businessman Ric Elias had a front-row seat on Flight 1549 that crash-landed in the Hudson River in 2009. He describes what went through his mind as his plane was going down. As a teenager, Maajid Nawaz was active in an extreme Islamist organization. But after spending five years in an Egyptian jail, he now devotes himself to promoting democracy in the face of extremism and xenophobia. Journalist Joshua Prager describes his life before and after a devastating bus accident that left him paralyzed on his left side. He probes questions of self-deception, identity, and whether the crash or his response to the crash has ultimately defined him.

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