Natural magnetic fields are revealed as chaotic, ever-changing geometries. br br Scientists from NASA's Space Sciences Laboratory excitedly describe their discoveries. br br Natural magnetic fields are revealed as chaotic, ever-changing geometries as scientists from NASA's Space Sciences Laboratory excitedly describe their discoveries. br br The secret lives of invisible magnetic fields are revealed as chaotic, ever-changing geometries. All action takes place around NASA’s Space Sciences Laboratory, UC Berkeley, to recordings of space scientists describing their discoveries. Actual VLF audio recordings control the evolution of the fields as they delve into our inaudible surroundings, revealing recurrent ‘whistlers’ produced by fleeting electrons.