Duolingo, the widely popular language-learning app, faced a wave of reactions after altering its iconic owl mascot, Duo, in the app's icon. The once cheerful green bird appeared to be melting like a ...

WASHINGTON — Language learning app Duolingo revealed this week that the bright green owl that was the face of the company has "died," in a viral social media stunt. Duo, who was known for his menacing ...