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Companies making genetically modified animals face a regulatory morass in this country. It's not always clear which federal agency has responsibility for regulating a particular animal, and even when one agency does take the lead, the approval process can drag on for years.

The revolutions in Egypt and Tunisia took place in a matter of days, filling those countries with hope of a brighter future. Both countries have held elections, but creating a democracy will take time.

The comedian's latest special, Live at the Beacon Theater, was released in early December. C.K. talks about why he went with Web distribution this time, and reflects on his award-winning TV series, his relationship with other comedians and his USO appearances.

Millions of people are searching for things every day on Google. The people at the giant search engine company realized that if they tracked those searches, the patterns can tell us about what's happening with people's lives.

Unlike GOP presidential primary seasons of the past, the one that begins in Iowa Tuesday was actually designed to slow down the emergence of a winner by stretching out the calendar and altering the delegate allocation rules. It will take until March 24 to allocate a bare majority of the delegates.

As the hours tick away toward Tuesday evening's first important contest of the 2012 presidential election season, the frontrunners are looking to hold their positions and the rest are trying to survive to fight again next week In New Hampshire.

Dozens of fires, many of them begun in cars, had been set in the city since Friday.

She's a "consistent, conservative fighter," the ad proclaims. Since winning the Iowa straw poll last August, her poll numbers in the state have fallen into single digits.

Scientists have long pointed to identical twins to show that genes reign supreme in the battle of nature versus nurture. But a growing body of research suggests another factor, called epigenetics, may change how those genes are expressed. National Geographic's Peter Miller explains what science is learning from twins.

Candidates made their last-ditch campaign efforts in Iowa Monday ahead of Tuesday's caucuses. The Des Moines Register's Iowa poll predicted a close three-way race between Mitt Romney, Ron Paul and Rick Santorum. Pollster Ann Selzer shares the poll results.