LiDAR finds huge Mayan city-state

“In addition to hundreds of previously unknown structures, the LiDAR images show raised highways connecting urban centers and quarries. Complex irrigation and terracing systems supported intensive agriculture capable of feeding masses of workers who dramatically reshaped the landscape.”

…

“’Most people had been comfortable with population estimates of around 5 million,’ said Estrada-Belli, who directs a multi-disciplinary archaeological project at Holmul, Guatemala. ‘With this new data it’s no longer unreasonable to think that there were 10 to 15 million people there—including many living in low-lying, swampy areas that many of us had thought uninhabitable.’”

http://www.thehistoryblog.com/archives/50453