May 18, 2013 — The world's top health problems are more common in men than women. But recent global funding has been skewed toward women's issues. Some health economists say more effort should go toward stopping men's risky behaviors, like smoking and drinking.

May 17, 2013 — Of all the current Washington scandals, the one involving the IRS appears to have the most staying power. It rolls into one package an agency many love to hate, partisan suspicions and the American appetite for conspiracies.

May 18, 2013 — Atmospheric scientist Ira Leifer installed special air sensors on a camper, then drove from Florida to California, measuring methane levels all along the way. More than 6,000 readings later, he found some noticeable spikes, especially around petrochemical plants and urban areas like Los Angeles.

May 18, 2013 — The show has become a social event for a large and varied crowd of African-Americans and others on Twitter, for reasons mysterious, complex and worth exploring.

May 18, 2013 — Research shows that prime-time television isn't a bad place to find portrayals of working women. Working moms and working women over 40 are another story.