"In Western music, there's nothing that says 'sad' like a minor key," explains the Exploratorium science museum. You don't have to be up on your music theory — or have synesthesia — to recognize when a song is written in a minor scale, and the difference between major and minor is pretty clear when you hear a minor song transposed into a major key. (Without getting into too much complex music theo
![Sad songs made happy: The amazing art of turning minor-key songs major](https://cdn-ak-scissors.b.st-hatena.com/image/square/84db40dc9b1845d8ae5c25295a76714ae717cd91/height=288;version=1;width=512/https%3A%2F%2Fcdn.mos.cms.futurecdn.net%2FFv6mxg6vBe9Yvp5a3rUUaY-1200-80.jpg)