As the weeks before my trip dissolved into days, I kept up my Duolingo streak, racking up badges and encouraging notifications from Duo, the brand's green owl mascot. Then came my flight — and ...

Anyone who’s ever used the language learning app Duolingo knows resident mascot Duo the green owl can be a little…needy. Duo ...

As soon as a green owl appears on some of my friends’ screen, it is time for them to pick up their phones to continue a streak. Ten minutes later, they tell me how they completed their ...