Extremely Deep: Mining for gold

Extremes month continues, and this week we're going extremely deep; Chris Smith takes a trip to one of the world's deepest mines in search of gold. Plus, in the news, the GM mosquito that wipes out its own population, and would you return a lost wallet if you found one? We hear which is the most honest country in the world, and who's the least honest. Like this podcast? Please help us by supporting the Naked Scientists