Eric Walker added Researchers find 3,000-year-old Maya structure larger than their pyramids - ABC News to a number of topics

Eric Walker added Researchers find 3,000-year-old Maya structure larger than their pyramids - ABC News to Olmecs, and added Olmecs to Ancient civilizations

Eric Walker added a number of topics and a number of links to Ancient civilizations, and added Ancient civilizations to Society, culture, cultures, civilization and civilizations and Ancient, classical, medieval and enlightenment history