Talk of the Nation

After Rep. Todd Akin's remarks about rape, the Washington Post's Ruth Marcus posed a question: "Is it any wonder Americans hate politics?" Republicans, she says, reacted just strongly enough to serve their own interests. And Democrats, Marcus argues, do their own part by driving voter cynicism.

More people are getting their exercise by walking, according to a new study by The Center for Disease Control and Prevention. The health benefits are clear: Walkers generally have a lower risk of heart disease and diabetes. If walking is your form of exercise, why does it work for you?

In an op-ed for The Wall Street Journal, former Major League Baseball commissioner Fay Vincent describes incidences of clubs, offices and public spaces posing obstacles for him and his wheelchair. He joins NPR's John Donvan to discuss the places where those in wheelchairs still don't feel welcome.

Rep. Jesse Jackson Jr.'s recent diagnosis of bipolar disorder has focused attention on the shame that sometimes accompanies mental health diagnoses in the African-American community. Psychiatrist William Lawson joins NPR's John Donvan to discuss why such a stigma exists.

Syria's civil war erupted again on Monday, just one day after the U.N. ended its monitoring mission in the country. Reporter Jon Lee Anderson joins NPR's John Donvan to discuss the different factions that are rising up amid the current confusion.

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FLORA LICHTMAN, HOST:

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FLORA LICHTMAN, HOST:

Up next, math books get a makeover. You may remember my next guest from her acting roles on "The Wonder Years." Winnie Cooper may ring a bell or "The West Wing." But for thousands of girls today, she's the writer and personality behind a bestselling series of books that aim to teach girls about math. First, there was "Math Doesn't Suck," then "Hot X: Algebra Revealed," and now we're onto geometry.

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FLORA LICHTMAN, HOST:

This is SCIENCE FRIDAY, and I'm Flora Lichtman. On any given day, visit the website brainpickings.org, and you'll find posts on topics ranging from Charles Darwin's notes on marriage, to a birthday tribute to Julia Child, to the poetry of Patti Smith.

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FLORA LICHTMAN, HOST:

This is SCIENCE FRIDAY. I'm Flora Lichtman, filling in for Ira Flatow, who's out today. This week, the FDA approved a new influenza vaccine for this year's flu season, and soon enough summer will be over and you'll be standing in line again at your pharmacy or doctor's office, participating in that yearly ritual - your annual vaccination allocation.

The Reinvent the Toilet Challenge asked engineers to dream up a replacement for the antiquated flush toilet. Michael Hoffmann and his team at Caltech responded with a solar-powered toilet that disinfects waste and reuses wastewater to flush. Better yet, it pumps out hydrogen gas for use in fuel cells.