Satellite images have given us a tremendous view of how the Earth looks from space, but what about how it sounds? Well now we have just that. NASA has released a recording of a phenomenon called chorus, which consists of radio signals caused by plasma waves found in our planet's radiation belts. The sounds were captured by a pair of probes currently in the midst of a two-year long mission through the belts. "This is what the radiation belts would sound like to a human being if we had radio antennas for ears," explained Craig Kletzing, from the University of Iowa, who says that the new recording is "one of the clearest examples" of chorus so far. However, we may eventually have something even better. "We have two spacecraft with two receivers," he added, "so a stereo recording is possible."