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Which comes first, the probiotics or the prebiotics?

Could prebiotics, the food for the good bacteria known as probiotics, have more benefits than a dose of the microbes, particularly for people with serious health problems like preemies?

Presidential debate No. 2 is in the books, and the consensus is that — unlike debate No. 1 — President Obama came prepared for battle. For all the talk about "binders full of women," and what was said when after the events in Benghazi, Libya, Obama and Mitt Romney both made their cases. Now, they prepare for the third and final debate on Monday. We also bid farewell to former Pennsylvania Sen. Arlen Specter.

Join NPR's Ron Elving and Ken Rudin for the latest political roundup.

"How long can this situation continue? I mean in Bosnia, now we have Ban Ki-moon [the UN secretary general] apologizing 20 years after. Who will apologise for Syria in 20 years' time? How can we stay idle?"

This interview was originally broadcast on Feb. 1, 2012. How to Be Black will be released in paperback on Oct. 30.

It's no coincidence that Baratunde Thurston's new memoir and satirical self-help book How to Be Black was slated for release on the first day of Black History Month.

Transcript

FLORA LICHTMAN, HOST:

This is SCIENCE FRIDAY, I'm Flora Lichtman, filling in for Ira Flatow today. The moon, it's our nearest neighbor, but we don't know much about where our companion came from. In the 1800s, Charles Darwin's son, Sir George Darwin, proposed that maybe the moon just popped off from the Earth when the Earth was spinning much faster than it is today.

A NASA spacecraft captured the clearest recording yet of what space sounds like inside Earth's radiation belts. Craig Kletzing, a professor of physics and astronomy at the University of Iowa, explains what causes these eerie chirping noises, and what we can learn from them.

Science Or Folklore? — The Old Farmer's Almanac predicts winter weather months in advance. Is that even scientifically possible? Meteorologist Jason Samenow, of The Washington Post's Capital Weather Gang, talks about the science and art of seasonal forecasting, and why even the pros at NOAA sometimes get it wrong.

In less than a month, the 2012 presidential election turned from an almost certain victory for President Obama to a neck-and-neck race. New York Times blogger and statistician Nate Silver and Princeton neuroscientist Sam Wang talk about making sense of the polls--and why not all votes are created equal.