Bolivia's water people

The Uru Chipaya tribe of Bolivia is thought to be the oldest surviving culture in South America.

The people have lived on the country's high salt plains for 4,000 years - long before the Inca empire and the Spanish conquest.

The tribe survives by flushing the salty soil with river water. This allows them to farm.

According to mythology, the Uru Chipaya are 'water beings' who came from the river itself.

It's the source of their spiritual identity and they depend on it for their survival.

But, as Andres Schipani discovered, now the river is drying up.