10km is 6.2 miles. how is anything getting down that far???
the Miao Keng is a naturally-occurring shaft, the Mponeng Gold Mine in South Africa is the deepest mine shaft in the world. Its depth measures an astounding 4km. just asking, no rearing back and pawing the air, please
10km is 6.2 miles. how is anything getting down that far??? the Miao Keng is a naturally-occurring shaft, the Mponeng Gold Mine in South Africa is the deepest mine shaft in the world. Its depth measures an astounding 4km. just asking, no rearing back and pawing the air, please