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The human body contains about 100 trillion cells, but only maybe one in 10 of those cells is actually human. The rest are from bacteria, viruses and other microorganisms. Now, scientists have unveiled the first survey the "human microbiome," which includes 10,000 species and more than 8 million genes.

French researchers report in a new paper that a reconstructive surgery they used to try to repair the genitalia of women circumcised at a young age has helped many of them experience sexual pleasure one year after the surgery.

A 700-pound NASA science satellite roared into orbit Wednesday on a mission to map high-energy features across the universe, including black holes and supernovae. The NuSTAR mission will provide scientists with unprecedented resolution for viewing X-ray objects in space.

Will unmarried women, representing about a quarter of the nation's eligible voters, retain their ballot-box ardor for President Obama? And will their married counterparts give Republican Mitt Romney more electoral love than they gave John McCain in 2008? The answers could decide the election.

The alleged victim said Sandusky told him if he said anything about the abuse, he would never see his family again.

The U.S. Anti-Doping Agency has filed new charges against cyclist Lance Armstrong. Melissa Block talks with the Washington Post's Amy Shipley about the allegations and Armstrong's past doping fights.

The city is rallying around its famous newspaper, the Times-Picayune, as it goes through layoffs and publication cutbacks. The public outcry is escalating, with the upper echelon of the city's political, business and cultural leaders pleading with the paper's owners to reconsider.

The housing market is finally showing signs of a comeback, according to an annual study from Harvard. Home prices have stopped falling in many areas, and buyers are growing more confident. But, though mortgage interest rates are at record lows, banks are often cautious to lend.

Prosecutors admit that the constitutional right to an attorney is inconsistently applied for indigent criminal defendants in some states. In Michigan, officials have repeatedly ignored pleas to change how it pays lawyers for the poor. But lawsuits and exonerations may be starting to change that.

Iran's supreme leader has repeatedly cited his own fatwa, or religious edict, that nuclear weapons are a sin and that Iran doesn't want them. Many in the West are skeptical, but U.S. officials are calling on Iran to live up to the fatwa.