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When crops are surrounded by high levels of carbon dioxide, they're more productive. But they may have lower concentrations of some crucial nutrients, which could increase malnutrition in the future.

With immigration overhaul a non-starter in Congress, advocates of change have been urging the Obama administration to make some changes on its own.

There's an assumption that women are more likely than men to collaborate. But as the number of women in Congress has increased, so has the partisanship and gridlock. Does a woman's touch help?

Bayer has announced it is buying Merck's consumer drugs business, and Pfizer is trying to take over AstraZeneca. Why is this reorganization happening now, and what does it mean for drug development?

It's a single sheet of paper, with the original version of the lyrics to Bruce Springsteen's "Born to Run." A businessman paid almost $200,000 for the manuscript, now on display at Duke.

Ten-year-old Lyle Pemble loves roller coasters so he asked his dad to build one in the backyard. It took six weeks to complete the project.

Steve Inskeep talks to retired Gen. Carter Ham about U.S. assistance to Nigeria to help locate and rescue kidnapped school girls. Ham was the commander of the U.S. African Command from 2011 to 2013.

A day after Russian President Vladimir Putin told separatists in Ukraine they should postpone a referendum on secession, leaders of a militant group say they'll hold the vote this Sunday as planned.

Syrian rebels have pulled out the central city of Homs, which was known as the birthplace of the uprising against the government. Forces backing President Assad have retaken the town.

Top earners are usually paid when they stay home sick, but low-income workers are not. That has triggered a debate about fairness and risks to public health when incentives force sick people to work.