With brushes and trowels, Indigenous Colombians are unearthing traces in the jungle of a tragic period in history, when their ancestors were violently supplanted by colonists from Spain.At first it was "difficult" to convince the local population of Unguia, a municipality in the middle of the Darien jungle, to get involved, recounted Sarcina, who works for the Colombian Institute of Anthropology and History, which is funding the project.