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Scientists teach the FBI and others to understand facial expressions to ferret out criminal and terrorist motivation. Research links tics, furrows, smirks and frowns to emotion and deceit.

Although Fidel Castro has announced he's giving up his role as Cuba's president, the leader has demonstrated that he doesn't necessarily need a title to exert control over the island nation's government.

Your most direct link to global warming may be the food you eat. The bounty of your local grocery store depends on natural cycles of rain and heat in far-flung parts of the world. Now those cycles are shifting and the effects on agriculture may be profound.

Strategists on the left and right say health care protesters represent a growing problem for the White House: The passion seems to lie with opponents of the overhaul amid growing voter fears that the American Dream is slipping out of grasp.

A hint of the gathering storm came more than two weeks ago, when a polite older woman named Mary called into an AARP-sponsored health care "tele-town hall" with a question for President Obama.

The Asylum Street Spankers On Busking, Spanking, And Lunchboxes

Where do stem cells come from? And, what can they be used for? We speak to the co-author of the new book, Stem Cells For Dummies.

Death at a Funeral

The CIA is holding top al Qaeda suspects in secret prison compounds in Eastern Europe as part of a string of so-called "black sites" set up after the Sept. 11 attacks, The Washington Post reported this week. Linda Wertheimer talks with Post reporter Dana Priest about the detention centers and the human rights concerns they have raised in Europe.

The Olympic torch is now on its 85,000 journey to Beijing, despite attempts by human rights protesters to disrupt the torch-lighting ceremony in ancient Olympia, Greece.