Report request: I am a college student writing a short paper aimed at the anthropological community on the recently discovered evidence for ancient civilizations in the Amazon basin.
I want a report that presents the basic facts about what has recently been discovered on ancient agriculture-based civilizations in the Amazon basin. I also want to learn about rock art in these areas, as it might provide clues to the use of agriculture.

Assessment questions and gold answers:
question_text: When is it thought that humans may have first settled the Amazon region?
gold_answers: Approximately 15,000 years ago
question_text: In which South American countries has evidence of ancient civilizations dating back more than 10,000 years recently been found?
gold_answers: Bolivia
question_text: In which South American countries has evidence of ancient civilizations dating back more than 10,000 years recently been found?
gold_answers: Brazil
question_text: In which South American countries has evidence of ancient civilizations dating back more than 10,000 years recently been found?
gold_answers: Colombia
question_text: How were these sites discovered?
gold_answers: Using radar from helicopters
question_text: How were these sites discovered?
gold_answers: Using satellite imagery
question_text: Where technology was not involved, what tipped off scientists that there might be evidence of human action in the jungle?
gold_answers: Clusters of trees not typical of their area