What is "aluna"

Aluna is a 2012 feature-length documentary film sequel to the 1990 BBC documentary The Heart of The World: Elder Brother's Warning. The first documentary showed an ancient Kogi tribe civilisation (the Elder Brother) who emerge to offer their concern for people of the modern world (Younger Brother). Younger Brother is urged to change or suffer environmental disaster. After offering the warning the Kogi retreat back to civilisation hidden in a mountain in Sierra Nevada de Santa Marta, Colombia.

The Kogis have re-emerged. Long-ago realising that the importance of their warning had not been grasped. As well as warning Younger Brother they have decided to share their secret sciences in the belief that sharing these new sciences will share their burden of changing the world for the better.