Ham Radio gets a brief mention in this NASA video about the eerie-sounding radio emissions from around Earth.
A NASA spacecraft has recorded eerie-sounding radio emissions coming from our own planet. These beautiful “songs of Earth” could, ironically, be responsible for the proliferation of deadly electrons in the Van Allen Belts.
Watch ScienceCasts: The Sound of Earthsong
What is Ham Radio? http://www.uk.amsat.org/about/what-is-amateur-radio