6/6 How salt has played a key role in everything from ice ages to the preservation of food.
5/6 Dr Iain Stewart tells the story of man's 10,000-year battle to control water.
4/6 How rocks played a crucial role in determining the beliefs of ancient civilisations.
3/6 How geology has been a huge influence in shaping the history of art, from cave painters on
2/6 How rocks influenced the Egyptians to build pyramids, and the Greeks to build squares.
1/6 How earthquakes have created a huge network of cracks in the ground, pathways for minerals