In the Classical era, the colours on a piano keyboard were the other way round – the black keys white, and the white keys, black. So, when did it all change? And why are pianos made up of monochrome ...

It’s just like a regular grand piano… but all the keys are white. A full-size grand piano has 52 white and 36 black keys. But what would happen if you took away all the accidentals? This curious ...

Outside the Eastman School of Music, a group of volunteers repainted the crosswalk to look like three-dimensional piano keys in advance ... square of pavement, the white lines of crosswalks.