Lost Maya city uncovered in Mexican jungle, revealing crucial center of civilization.

Archaeologists from Mexico's National Institute of Anthropology and History have discovered a previously unknown ancient Maya city in the jungles of southern Mexico, likely an important center more than a thousand years ago. The city, named Ocomtun, includes large pyramid-like buildings, stone columns, three plazas with "imposing buildings" and other structures arranged in almost-concentric circles. The site probably declined around 800 to 1000 AD, likely due to "ideological and population changes" that led to the collapse of Maya societies in that region by the 10th century.