A new study has detected a large, rectangular platform made of earth in southern Mexico with the use of lidar technology. (Lidar employs lasers to generate 3-D models of vegetation-covered terrain.) The structure, thought to have been built by the Maya between 1000 and 800 BCE, measures more than 4,500 feet long by 1,300 feet wide and up to 50 feet tall.
Because it is so wide, the structure seems like a natural part of the landscape to people on the ground. It was only from the air that the rectangular shape made it clear that this was, once upon a time, a structure. The remote-sensing survey also found nine causeways and reservoirs linked to the new find.
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