To the unfamiliar, that term may seem off-putting, like a new soft-rock genre that leans heavily on harp solos.But it's possible many of us will be using cloud music systems in the not-far-off future.

Local people have also carved out over two hundred caves in the soft rock, and use them for everything from sacred burial places to food storage.

The Earth's crust is thought to be divided into huge, movable segments, called plates, which float on a soft plastic layer of rock.