Duchenne Smiles (Entry 385.PR1513)
May 29, 2018•59 min
In which we examine how flight attendants smile, baby chimps play, botox treats mental illness, and Oscar the Grouch was a harsh wake-up call for Gen X kids. Certificate #42013.Learn more about advertising on the HowStuffWorks podcasts at www.howstuffworks.com/advertisers.htmAnd to learn about your ad choices when listening to podcasts, visit https://www.howstuffworks.com/privacy.htm#ad-choices