Music. Lots of music

The way music has changed in the past century is phenomenal. Where before you had to play it yourself or go to concerts, you now can immerse yourself in the stuff without knowing anything or going anywhere. A while ago I had so much music on my computer that if I wanted I could go for at least a week without hearing the same song twice if I didn't want to. And I'm not as obsessed as some people are. It's a rather massive shift if you ask me, and no doubt in years to come it will provide historians and social scientists with ample fodder for study.

If you want to get still more music and learn about yet more bands, a useful site to keep checking is the Hype Machine, an aggregator of music blogs. Updating frequently, it's a treasure trove of all things musical. If you want to sign up, it promises that you're able to customize what you see, presumably allowing you to keep tabs on the genres that you particularly enjoy. Otherwise, check it frequently to see what people are listening to and what they think of it...