People's personalities can change considerably over time, say scientists, suggesting that leopards really can change their spots.

It’s no secret that battlefield trauma can leave veterans with deep emotional scars that impact their ability to function in civilian life.

“Be all you can be,” the Army tells potential recruits.

A program designed to boost cognition in older adults also increased their openness to new experiences, researchers report, demonstrating for the first time that a non-drug intervention in older adults can change a personality trait once thought to be fixed throughout the lifespan.

A new study finds that men and women really do have profoundly different personalities, and that each sex has firmly entrenched characteristics.