It was conceived as an investment in natural gas to power a nearby mine. Instead, in South Africa's Free State, known for its gold mines, two businessmen have unearthed a different type of nugget: what could potentially be the world's richest helium find. Less than ten countries produce this noble gas essential to the manufacturing of electronic chips, the operation of medical scanners and the aerospace industry. A NATURAL SOUND VERSION OF AN AFPTV REPORT