Roughly after some 13 billion years later, some creatures appeared on this planet and developed curiosity. They built tools and technology, and observed the footprints of their atomic ancestors -- some individual photons that have been redshifted for so long, silently, waiting to be known.
Listening to the Cosmic microwave background is a journey to our own past.
But first, you need Go and portaudio[*] installed on your computer. Install this program by running:
$ go install github.com/rakyll/cosmicbackgroundmusic
Then, run the server:
$ cosmicbackgroundmusic
Browse localhost:8080 and click on a region to listen.
[*] Use brew install portaudio
on a Mac.