Online Summarization Tool | PDF Summarizer | Summarize articles, text, documents with IntelliPPTTurner provided evidence in his Gordon R. Willey speech that two catastrophic droughts contributed to the downfall and depopulation of a civilisation that not only possessed colossal building but also a profound grasp of mathematics and astronomy.Aspects of this hypothesis have existed for a very long time. Archaeologists theorised that climatic change led to the demise of the Maya as early as 191
