A truck driver working at the bottom of Australia's deepest gold mine gets loaded up with about 55 tonnes of precious cargo — hard rock blasted from the Earth and containing small specks of the yellow metal. For every tonne trucks cart to the surface there might be only seven grams of gold, the equivalent of about one teaspoon. Driving at the speed limit of 30 kilometres an hour, it takes drivers just under two hours to make their way to the surface to dump their load and head back down. This is Gwalia in Western Australia's remote northern Goldfields. Today, it is the deepest trucking mine in the world and can trace ... (full story)