Almost 150 years ago, English scientist Francis Galton coined the phrase "nature versus nurture" — and proposed that research on twins could resolve the debate.

Genetics have long seemed to weigh heavily in favor of the role of nature in shaping the people we become. But even identical twins are different to varying degrees, and some researchers believe those differences suggest a third influence at work, called epigenetics.

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Alex Gilvarry is the author of From the Memoirs of a Non-Enemy Combatant.

I was a college student in New York City when security checks became the norm. Being half-Filipino with a Scottish last name, I wasn't easy to profile. And since I was always carrying a big backpack of textbooks in and out of the subway on my way to class, I came to expect that I would be stopped once or twice each week.

This week on Fresh Air, we're marking the year's end by revisiting some of the most memorable conversations we've had in 2011. This interview was originally broadcast on December 13, 2011.

Seth MacFarlane: A 'Family Guy' Sings Out

Jan 2, 2012

This week on Fresh Air, we're marking the year's end by revisiting some of the most memorable conversations we've had in 2011. This interview was originally broadcast on October 17, 2011.

Mike Fennelly isn't easily surprised by cutting-edge technologies, but when he started as an IT guy at a Silicon Valley startup called Evernote, he was caught off guard by a robot rolling around the office.

"It was slightly disturbing for not really knowing what the robot was for at the beginning, and then going, 'Oh, OK. That's Phil,' " he says.

CEO Phil Libin is also known as the company's "robotic overlord." Libin himself isn't actually a robot, but when he's out of town, his robot keeps an eye on things.

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Take The Day Off. In Fact, Take A Month

Dec 31, 2011

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Time now for sports.

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The Latest From NPR

Fresh Air Weekend highlights some of the best interviews and reviews from past weeks, and new program elements specially paced for weekends. Our weekend show emphasizes interviews with writers, filmmakers, actors and musicians, and often includes excerpts from live in-studio concerts. This week:

Maggie Gyllenhaal Takes On The Power Imbalance Of Sex Work In 'The Deuce': When the creators of HBO's The Deuce approached Gyllenhaal about starring as a sex worker on the show, she accepted the role — but only if she could produce as well as act.

During hurricanes like Florence, many people find themselves trapped and needing rescue. Sometimes volunteers step in to help — but emergency managers say some may be creating problems of their own.

San Diego Rhino Finds A New Home In Tanzania

3 hours ago

A rhinoceros born and raised in San Diego is getting used to a new home in Tanzania. The eastern black rhino is one of about 740 of the critically endangered animals left alive, and he recently completed a 68-hour journey to Africa.

"That was quite the feat," said Beverly "Beezie" Burden who works at the African reserve managed by the Singita Grumeti Fund.

Throughout the western U.S., water conservation is in the toilet.

And that's a good thing.

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