It's automatically clustering topics radially based on proximity to each other and to other disciplines.
Click on CS. Then click on CS again (now in the center). CS + Music is out by the Music field. CS + EE is all in a column pointed to the EE field.
It's a tool for discovery.
If I went looking for list of articles, linking CS + Music, this doesn't help me. I'd want to click CS, click music, and then receive a list of articles matching that correlation. Instead I have to hover over each dot, and scrub through years to even see titles for things. Sure, I get the "excitement" of not knowing what I'm looking for, but that is not a usable tool for discovering articles.