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Modern medicine is in danger of losing a powerful, old-fashioned tool: human touch. Physician and writer Abraham Verghese describes our strange new world where patients are data points. He calls for a return to the traditional physical exam.

Why do we use robots on Mars, but not in our living rooms? Cynthia Breazeal realized the key was training robots to interact with people. Now she builds robots that teach, learn — and play.

Kathy Reichs, the writer and scientist behind the TV show Bones, is back with a new novel for young adults. Code: A Virals Novel stars Tory Brennan, great-niece of Reich's famed crime-solving heroine Tempe Brennan. Reichs discusses the book, co-written with Brendan Reichs.

Host Michel Martin checks in with the Barbershop guys for a fresh cut on the week's news, including the new pope and college basketball's March Madness. Martin is joined by culture critic Jimi Izrael, attorney Arsalan Iftikhar, sports writer Pablo Torre and Reverend Leo Patalinghug.

Jeb Bush is popular in conservative circles and is the third member of the Bush family to be seen as a presidential contender. (The last two were elected.) So is there some sort of How to Be President checklist somewhere in the Bush house? If so, it might look something like this.

Is it the message or its delivery? That's one of the questions being debated as Republicans — like all parties out of power — plot their comeback. Some think they need to take a new tack on issues; others believe that the GOP's core conservative principles are still political winners.

Scientists say the discovery of more carbon than oxygen and no methane in the atmosphere of a gas giant favors one theory of solar system formation.

Harvesting stem cells from human fat may be an effective way to treat brain cancer, researchers report in the journal PLoS One. Alfredo Quinones-Hinojosa, of the Johns Hopkins School of Medicine, explains how fat cells can be used as Trojan horses to fight cancer.

Suffering a single concussion may cause lasting brain damage, researchers report in the journal Radiology. Steven Flanagan, co-director of the Concussion Center at NYU Langone Medical Center, discusses the findings, and why diagnosing a concussion is so difficult.