#geoglyphs

  1. 24 ancient earthworks have been detected in the Amazon. There may be 10,000 more, scientists say

    By Mindy Weisberger, CNN Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more . From deep in the Amazon rainforest, two dozen previously unknown pre-Columbian earthworks have been brought to l