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A survey of more than 3,500 people caring for family members with dementia finds that many are spending down personal savings and cutting into their own basic needs to meet their loved one's expenses.

Russia is not participating in this year's Nuclear Security Summit in Washington, D.C., this week. It's the final such event of the Obama administration. Critics are underwhelmed with what the president's nuclear security push has accomplished, and it isn't clear whether the event might continue on into the administration of the next president.

Human skin has properties that are hard to mimic, but a Stanford engineer is working to create a type of artificial skin that can sense, heal and generate its own power.

A study of Social Security and tax records says poor people live longer in some cities than in others, and it's not clear why.

Obesity and Type 2 diabetes are becoming more common all over the world. But the tiny Samoan islands now have the highest rates. An epidemiologist blames changes in diet brought on by globalization.

Samsung's rigorous aptitude test underscores the company's near-mythical status in Korean society. "I think this is only the way to be successful," says a test-taker before braving the entrance exam.

Raising crops in the city has become trendy, yet earning a living at it is tough, a survey finds. But many urban farmers are in it for other reasons, like addressing hunger and building community.

A new batch of documents reveals the tension between his desire to micromanage al-Qaida's day-to-day operations and his fears he might be detected and killed by sending out directives.

After decades of speaking out against income inequality, the senator found fertile ground for it nationally in this post-recession, post-Occupy era. What's the long-term outlook for his movement?

Howard Bryant of ESPN.com talks with NPR's Lynn Neary about the NBA playoffs and drug use by baseball players.