I saw this posted on slashdot this morning but thought it was interesting. They talk about Auroral Kilometric Radiation which is caused by charged particles from the sun hitting Earth's magnetic field. To me this is what makes science so great.
I wonder if other planets make similar sounds. I would be interested in what Neptune and the other gas giants would sound like. I wonder radio would sound like if we could go back in time with a receiver before we had anything that could cause interference. I'd like to listen to VLF myself someday among other things.