What do Tiger Woods, Michelle Williams and President Joe Biden all have in common? Like around 3 million people in the United States, they are all people who stutter. Stuttering commonly develops around childhood and most people stop stuttering by the time they reach adulthood. However, stuttering persists for some adults and researchers haven’t been able to figure out why. But findings from a recent study may get them one step closer to finding out: Adults don’t stutter when they talk alone. Join Scienceline reporter Kharishar Kahfi as he learns more about the communication disorder and what the new discovery adds to the field of stuttering research. You can read more on our website: https://scienceline.org/2022/03/do-stutterers-always-stutter-not-really/ Music: Thinking Music by Kevin MacLeod | Filmmusic.io Standard License Western Streets by Kevin MacLeod | Filmmusic.io Standard License Sound effect: Phone Ringing by acclivity | CC BY 3.0