Music Timeline

https://research.google.com/bigpicture/music

Google considers everything, decided to count music - "I was counted".

Visual scale of popularity of musical styles depending on time.
If you click on any style of music, then we get a scale of this style with component directions. For example, if you press ROCK, we see that it consisted of CLASSIC ROCK, HEAVY ROCK ...

You can not only admire it, but also pick it up And buy it on Google play. Actually this is the service from Google Play.