It is a mineral used to make types of plaster which coat our homes, schools and offices - and in Cumbria sits the world's deepest gypsum mine. Outside the small village of Long Marton, against the ...

Mponeng in South Africa is the world's deepest gold mine. The Kola Superdeep Borehole is only 9 inches wide. Russian scientists have been drilling it since 1970. It's now deeper than the deepest ...

Johannesburg was discovered in 1886, following the discovery of the main Witwatersrand gold reef, which today houses the ...