A typical piano has 88 keys spanning just over seven octaves. There are other, smaller keyboards or synthesizers that have fewer keys – most come in increments of 25, 32, 49, 61 or 72 keys.

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 ...

Good morning. It’s Thursday. Today we’ll look at what happened to the keys on a concert pianist’s piano when he moved to New York from Paris.