Bulmer Cave explorers come up short

A group of intrepid cavers have surfaced after exploring previously unexplored reaches of the Bulmer Cavern near Murchison. It was a 17-day expedition and they hoped to prove the cave system to be the most extensive in the Southern Hemisphere. Ultimately they came up short but in spite of failing in their goal, their expedition was still a exceptionally special speleological experience. Cave diver Kieran Mackay tells Guyon Espiner what they found down there.