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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.

A tree that researchers once thought was doomed because of acid rain, is now growing faster than ever. And its not the only one.

Emily Gould's first novel stars 30-something single women in New York City who are figuring out what's important in life. It's worth picking up for its sharp social observations and inspired wordplay.

If you're going to be downbeat, glum, or morose, it's best to do it the way Timothy Showalter does it.

Department of Homeland Security Secretary Jeh Johnson did not provide specifics for the new measures, but he said the agency is hoping to cause "as few disruptions to travelers as possible."

For more on the Palestinian reaction to recent tensions with Israel, Robert Siegel speaks with Mkhaimer Abu Sada, a political science professor at Al-Azhar University in Gaza City.

Ahmed Abu Khattalah, a suspect charged in connection with the 2012 Benghazi attacks, had a hearing Wednesday in Washington, D.C. After a public defender outlined her arguments in Khattalah's defense, the judge ordered that he be detained.

The independent Privacy and Civil Liberties Oversight Board has offered recommendations on how to reform one of the surveillance programs deployed by the National Security Agency. The privacy board found that the program, which was revealed by former NSA contractor Edward Snowden, is constitutional and free of abuse, but it's still proposing reforms.

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.

Facebook scientists were criticized for a study that manipulated what some users saw in their feeds. COO Sheryl Sandberg said the social media site didn't mean to upset users.