A weekly show where knowledge junkies get their fix of trivia-tastic information. This week, John tells you about 21 things that turned 21 in 2017. Get ready to feel old! Subscribe for new episodes of mental_floss every other Wednesday ---- Website: www.mentalfloss.com Twitter: www.twitter.com/mental_floss Facebook: www.facebook.com/mentalflossmagazine Store: store.mentalfloss.com/ (enter promo code: "YoutubeFlossers" for 15% off!)