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May 1, 2015 08:33 AM ET // Owen Jarus, LiveScience
The city, which contains flat-topped pyramids, was in use between roughly 600 B.C. and 300 B.C., when the first cities were being constructed in the area.
Dec 29, 2014 08:30 AM ET // Tia Ghose, LiveScience
Sediments drawn from the Blue Hole and other sites in Belize suggest that the Mayan civilization may have collapsed twice due to drought.
Sep 2, 2014 05:00 PM ET // Jennifer Viegas
Mind-altering substances were all the rage 1,500 years ago, at least among certain elite members of a South American society.
Aug 15, 2014 11:30 AM ET // Rossella Lorenzi
One of the cities featured an extraordinary facade with an entrance representing the open jaws of an earth monster.
Aug 15, 2014 12:01 PM ET // Rossella Lorenzi
No other site has so far been located in this area, which extends over some 1800 square miles in the Mexican jungle.
Jan 5, 2012 11:32 AM ET // Tim Wall
Failed monsoons in 14th and 15th century coincide with the Khmer Empire's collapse in SE Asia.
May 19, 2012 12:48 AM ET // Trace Dominguez
Are pit bulls as dangerous as Maryland thinks they are? How long should women breast-feed? Did the Mayans actually predict doomsday? Find out the answers in This Week in Discovery News.
Dec 12, 2012 03:00 AM ET // Tim Wall
Check out The Hunt for Lost Cities: Photos