How does the discovery of over 20,000 precolonial earthworks in the Southwest Amazonia affect our understanding of the region's ancient cultures?

The finding suggests that the northern part of southwestern Amazonia may contain as many earthworks as previously estimated for the whole of Amazonia.

• Option 1: This new discovery is unconfirmed by other evidence in the region.
• Option 2: (No additional information provided)
• Option 3: This question is uncertain without further data.
• Option 4: Only time will tell how significant this discovery really is.