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

Tea Party backed senators Ted Cruz of Texas and Mike Lee of Utah got into a rhetorical fight with fellow Republican Sen. Bob Corker of Tennessee, who accused them of grandstanding.

The showdown over the possible government shutdown is still going on, but already some House Republicans are thinking about the next big battle — over raising the government's debt limit. Here's a look at the list of things they want in exchange for preventing a debt default.

In some countries, it's easier to get HIV drugs than an old-fashioned form of penicillin that prevents heart damage from rheumatic fever, scientists say. The world's supply of this type of penicillin has dwindled over the past few decades, but rheumatic fever hasn't.

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.

During a Senate Intelligence Committee hearing, NSA Director Gen. Keith Alexander would not say.

People tend to throw whole pieces of paper in the recycling bin — and fragments of paper in the trash. Research on the trend finds that we may be acting on unconscious prejudice about what is worth recycling.

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.

As the military-backed government in Cairo continues its offensive against the Muslim Brotherhood, there is also a widening crackdown on the media. Army officers now call the shorts at State TV, and independent journalists are under increasing pressure to toe the line.