The Herculaneum Scrolls: Scholars believe the damaged scrolls of Herculaneum could contain lost works of Greek philosophy, Roman poetry, or early Christian writings.Physical Cause of PTSD: Scar tissue found in the brains of combat veterans who suffered from PTSD could mean that many cases of the disorder are caused by physical trauma.Daniel Barenboim: Watch the legendary 75-year-old maestro Daniel Barenboim bring Muslims and Jews together in his West-East Divan Orchestra.