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Black high school students are engaging in risky sexual behavior far less often than they were 20 years ago, a study found. But their condom use is also dropping, leading some to worry that HIV rates within the black community may not go down.

For centuries people have lived and worked in a part of coastal Peru spotted with oddly shaped hills. Most knew that the mounds were man made, but were…

Adam Steltzner, the leader of the Mars rover's entry, descent and landing engineering team, says he was terrified of "a false positive celebration" in the control room. Fortunately for him, Curiosity landed perfectly. Now he's eyeing Jupiter's moon.

Actors in period garb are the usual denizens of the Strawbery Banke Museum campus in Portsmouth, N.H., which spans 250 years of history. To make ends meet, the museum has lured more modern dwellers.

Russian authorities are investigating a reclusive Islamic sect said to have lived in subterranean burrows without electricity for 10 years. Officials have taken some 20 children away from the group in a case that pits religious freedom against wider social values.

Long-term gains in longevity continue. Today's 65-year-olds can expect to live a tad over 20 more years. That's a huge jump from 1980, when 65-year-olds could expect 14 more years of life. A big part of the reason is that deaths from heart disease and stroke have plummeted by nearly 50 percent.

Want to know a secret? London has been a great place to visit during the Olympics. The city hasn't come to a grinding halt. The weather has not been awful; the sun has even been shining. And London has put out the welcome mat to visitors.

The battle over sequestration is getting louder, as the defense industry mobilizes to prevent across-the-board cuts to Pentagon spending. Non-defense groups are trying to avoid being drowned out.

In Days of Destruction, Days of Revolt, Pulitzer Prize-winner Chris Hedges examines the tensions that arise between profit, progress, technology and the pursuit of the American dream. Written with co-author Joe Sacco, the book critiques an economic system that they say abandons too many Americans.

After the death of cyclist, the British star made the case for helmet laws. For that, he's been denounced in the U.K. by those who say such a law would make cycling less popular.