One of the many spacecraft that NASA has in orbit around the Earth has recorded the ‘Earthsong’. What is that? The ‘Earthsong’ is a weird sounding radio emission that is coming from the Earth! The Earth can sing, if you will. The sound, called Chorus, is an electromagnetic phenomenon caused by plasma waves in Earth’s radiation belts. This phenomenon is being studied further by NASA. They have launched more probes to investigate this really cool phenomenon.