Researchers have discovered nearly 500 ceremonial complexes in Mexico, and they are thought to have been of cosmic importance to Mesoamerican civilizations over 2,000 years ago. The hundreds of sites were discovered using publicly available LIDAR data collected by the Mexican government... ...It is thought they were constructed by diverse groups between 1,050 BC and 400 BC...and, and, based on they way they are facing, many seem to be aligned with the sunrise of a certain date....