An animated graph of Billboard’s top songs from Polygraph lets you watch the top five songs rise and fall over time. Not only that, but it plays the number one song while it’s at the top! This covers the years 1956 to 2016, so you can select a great year for memories and just let it play. Well, that’s what I’ve been doing. You might want to to analyze the movement or something. This is cool. There are a few glitches in the 1950s, but the '60s really rock. And so do all the other years. -via Metafilter