"The collapse of the classic Maya civilisation was caused by only a 'modest' drop in rainfall, researchers claimed today. Archaeologists studying the ancient civilisation centred on present day Mexico and Guatemala claim rainfall reductions of just 25 per cent were enough to cause 'the disintegration of a well-established civilisation'. Theories about the collapse of Maya civilisation in 950AD have blamed social unrest, disease and extreme drought."
Read more: http://www.dailymail.co.uk/sciencete...#ixzz1nFnZPdXJ
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Maybe it is an clumination of factors that lead to the fall of Mayan civilization?