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Good Samaritans are celebrated in the press for doing the right thing all the time, but does all that attention lower expectations for everyday behavior?

Doctors have other ways to explain why wheat makes some people sick, like the hygiene hypothesis.

The tiny organism has an internal clock that triggers it to swim vigorously every 12.4 hours, coinciding with the changing tide — even when it's removed from its habitat.

From now on, the fast-food giant says, it will only market and promote milk, water or juice with its children's meals — though parents can still choose to order sodas for their children. The change comes as part of a larger plan to promote more healthful choices.

Leading Texas politicians have resisted the federal health care law. But in Houston, community groups and public health agencies are trying to educate the city's 800,000 uninsured residents about new coverage options.

Former Assistant Secretary of Education Diane Ravitch spent years advocating for an overhaul of the American education system. Now she criticizes changes that she used to support, like charter schools and school choice. She explains her reasoning in Reign of Error, her new book on the pitfalls of privatizing education.

David Greene speaks to Sid Bream, the former Atlanta Braves player whose dramatic slide into home plate ended the Pittsburgh Pirates last playoff run in 1992. A Pennsylvania native and former Pirate, Bream is now cheering for the Pirates as they return to the post season for the first time in 21 years.

Over the course of its existence, BlackBerry sold smartphones to more than 200 million people. It became ubiquitous in places like Indonesia but it began with an invasion of Wall Street and Washington.

Microsoft's co-founder wishes Windows PCs had been given one start-up key instead of the famous three-key combination. But fans are both nostalgic about what was required and say it helped protect their PCs from some problems.

A political journalist tells congressional Republicans to pull the trigger on a government shutdown and debt default... Speaker Boehner's attempt to placate his House GOP caucus' hardliners fails ... Someone goes cute and furry to sell Obamacare.