Some of you might just recognise the plaintive moan or humming sound of a llama. It's the sound that around five hundred years ago accompanied the building of an empire, the Empire of the Inca ...

Some of you might just recognise the plaintive moan or humming sound of a llama. It's the sound that around five hundred years ago accompanied the building of an empire, the Empire of the Inca ...

Libby Purves meets actor Brian Cox and singer June Tabor. Coming up at: 21:58 Weather View full schedule Inca gold llama (made between 1400 and 1550). Small statue from Peru Some of you might just ...