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The horrific effects of chemical weapons used during World War I led to a treaty banning their use.

A new report makes the case that insects may be essential to feeding a planet of 7 billion people. Why? They're nutritious, better for the environment than other protein sources and can generate jobs, according to the U.N.'s Food and Agriculture Organization.

The interest rate on government-backed student loans is going to double on Monday. As a result, some 7 million students expected to take out new Stafford loans could be stuck with a much bigger bill.

The amazing tale of two sisters from a poor neighborhood — who play tennis unlike anyone before them and each reach No. 1 in the world — is one we're not likely to see again.

Inspired by a TED talk, Winston Chen quit his software job and moved from Boston to a tiny Norwegian island with his wife and kids. He spent the year enjoying the outdoors with his family and writing an iPhone app, something he would never have done without his self-imposed sabbatical.

Organizing for Action — a group that formed out of President Obama's re-election campaign — has focused its ire on Republicans it calls "climate change deniers." But some environmentalists are frustrated with the president himself on issues like the Keystone pipeline.

Nearly 18 million tourists descend on our nation's capitol every year, and most of them are keen to spend time at the many free museums in Washington, D.C. But only about 100,000 people take the trip across the river to a museum of a different sort: the Pentagon. The Pentagon's exhaustive historical displays offer fresh insight into the range of the Defense Department's activities.

The heart of Tornado Alley is home to one of the fastest-growing Latino populations in the country. After last week's devastating twister, the community faces some unique challenges — including protecting vital documents and overcoming the fear of asking for help.

David Greene talks to David Smith, of The Guardian, about the deteriorating situation in the Central African Republic. The former French colony has been described as "on the verge of genocide" as sectarian violence has worsened.

The proposition that some extra weight may not be a health worry has sparked a heated medical debate. Some studies have found that a little extra fat might have benefits. A new analysis suggests that for almost all people excess weight increases the risk of death and disease.