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When it comes to living at extreme altitudes, Tibetans may have gotten a leg up from Denisovans, a species of archaic humans that lived about 50,000 years ago.

Digital mammograms are sharper and aid diagnosis, radiologists say. But these scans aren't significantly better than film scans in finding tumors in older women, a study finds. And they cost more.

Some parts of the program come "close to the line of constitutional reasonableness," so the board is offering some proposals to fix those concerns.

Files detailing Nebraska's homesteading history have been digitized and are now available to the public. The milestone's part of a larger effort by the Homestead Digitization Project to put all homesteading documents from around the U.S. online. For more on the subject, Robert Siegel speaks with historian Blake Bell from the Homestead National Monument in Beatrice, Neb.

The California city of Murrietta is embroiled in unrest, as anti-illegal immigration protesters have successfully blocked three buses transferring migrants from Texas to a local Border Patrol screening facility.

Tensions between Israelis and Palestinians are as high as they have been in years, following the killings of three Israeli teens and the death of a young Palestinian.

Robert Siegel speaks with Dana Leigh Marks, the president of the National Association of Immigration Judges, about the legal process facing unaccompanied children who cross the U.S.-Mexico border.

The bank's mortgage-lending arm agreed to pay up to $320 million to resolve allegations that it bungled applications for the federal Home Affordable Modification Program.

"For most people, this is going to be the most expensive hamburger they've eaten in their life," says economic analyst Joe Deaux of the street.com. Prices are soaring because of the on-going drought.

Action, singing and lots of fireworks — American movies celebrate the Fourth of July.