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In the developing world, women who want to space pregnancies can't always obtain birth control. A new insertion device for an IUD, post-childbirth, is being tested with promising results.

Some companies think microalgae could be the alternative protein of the future, but can it top plant proteins?

The Obama administration and the president's Chicago-based re-election campaign are trying to minimize the risks of offending teachers and union members by carefully navigating the tricky waters between Mayor Rahm Emanuel and the striking teachers.

A reporter's quest to understand differences in regional recipes of the Middle East staple yields homespun stories about their provenance.

South Korea conducts live-fire military drills Monday near its disputed sea boundary with North Korea, despite Pyongyang's threat to respond with a "merciless" attack. The exercise took place in the same area of the Yellow Sea that was the targeted by a North Korean artillery attack in 2010.

Increasing U.S. coal exports to China doesn't necessarily mean global emissions will rise. As demand abroad drives up coal prices at home, it could prompt U.S. utilities to switch to cheaper and more environmentally friendly natural gas. And that might alter the politics of climate change in the U.S., an expert says.

As the world's population tops 7 billion people, population experts are worried about inevitable increases in cars, computers, bigger homes and a drain on resources. In an effort to combat this, one California company is producing small, energy-efficient homes — some as tiny as 300 square feet.

Russian researchers in Antarctica are on the verge of piercing a hole through two miles of ice into an ancient lake, untouched by the light of day for some 20 million years. But it'll be a delicate process to break through without disturbing the pristine waters. Guest host David Green speaks with Antarctic researcher John Priscu about the process.

Roughly half of Facebook's users check in on smartphones and other mobile devices every month, but so far the company isn't making money on mobile. That's one of the potential pitfalls for the company as it prepares to sell its stock to the public.

On New Year's Eve, don't open the front door in Denmark, look out for falling furniture in Italy and chew lightly when eating black-eyed peas in the South of the U.S.