What is 'intelligence' for an extremely advanced civilization?

Download PDF of the book 'The Treasure of Sombrio Cove' at https://otesourodosombrio.com.br
(four first chapters)
Follow this Youtube channel to dive deep into this and other fascinating mysteries of Brazil.
The book The Treasure of Sombrio Cove and the content of this video related to the discovery of the treasure are works of fiction inspired by the story of the Treasure of Trindade.
Check https://pt.wikipedia.org/wiki/Tesouro_da_Trindade