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My sister is no science writer, and I'm no baker, but recently our worlds melded in a surprising way.

Here's what happened: Last October, I attended a workshop on artisanal bread and cheese-making at Salt Water Farms in Lincolnville, Maine. Farm manager Ladleah Dunn introduced us to the concept of making sourdough bread with levain, or starter, instead of packaged yeast.

Dutch lawmakers are calling for a parliamentary hearing, today, after new allegations of abuse by the Catholic Church surfaced over the weekend. This time, an investigation by the newspaper NRC Handelsblad found that Catholic-run institutions had surgically castrated young boys.

Regular aspirin use might reduce the risk of cancer by as much as 38 percent, according to a big new review of research on the issue. But "might" is the key word here, other scientists say. And even if it works, that benefit comes with costs, including an increased risk of ulcers and internal bleeding.

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ROBERT SIEGEL, HOST:

It's ALL THINGS CONSIDERED from NPR News. I'm Robert Siegel.

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ROBERT SIEGEL, HOST:

We don't know how common the experience of Robert Collins was, but in the age of social media, perhaps it was inevitable. Mr. Collins was a corrections officer in Maryland. He took a leave of absence after his mother died and then reapplied for his job. And he had to go through a security interview. During the interview, Mr. Collins was asked a question that he had never been asked before during the process. He was asked for his Facebook username and password. Robert Collins joins us from Towson, Maryland. Welcome to the program.

The sweeping health overhaul law turns 2 years old this Friday. And as it heads toward a constitutional showdown at the Supreme Court next week, the debate over the measure remains almost as heated as the day President Obama signed it into law.

The standoff between a murder suspect and French police in Toulouse, France, has stirred up a swirl of speculation about the man's background and motives, but so far there are relatively few confirmed facts.

French officials say the suspect is a 23- or 24-year-old Frenchman of Algerian decent by the name of Mohammed Merah, who had a long record as a juvenile delinquent.

He's suspected in the killings this month of three French paratroopers of North African descent, as well as a rabbi and three Jewish schoolchildren.