A new three-part Nat Geo series titled "The Stanford Prison Experiment: Unlocking the Truth" takes a closer look at what happened at one of the 20th century's most infamous academic researches.

Research shows that many inmates serving long-term or life sentences continue to cause trouble even behind bars. A University ...

Another study noted that each year of a prison term increases odds of divorce ... where they can be in the same room. Otherwise, they can only see each other twice a month, separated by glass.

Angola was once called America’s bloodiest prison. The largest maximum-security prison in the United States, Angola has 6,300 prisoners and 1,800 staff. It occupies 28 square miles in Louisiana, a ...