Duo, Duolingo’s owl mascot—a creature that grew so tired of reminding you to practice your French he caught an awful flu—will now be hounding you to get your damn hands on those piano keys ...

Fear of a black key?… Don't be afraid. Adding flats and sharps to your music will give it a new lease of life.

A standard piano has 88 keys: 52 white and 36 black. But who decided this number would be the norm, and why? The king of instruments has played a significant role in music history. From concertos and ...