Aral Sea - All appearances of Aral Sea lake. The lake level fall of Aral Sea during the last fifty years was not the only dramatic low-stand in its history. In last two thousand years four major regressions have been recognized. During one of these regressions (at -0-400 AD) lake level was probably lower than in the last decade. This knowledge has opened the theme of the rate of anthropogenic and natural influences to the lake level fall. Despite that people has influenced the area for several thousand years the leading factor causing Aral Sea desiccation was probably climate. People has "only" reacted to the climatic worsening and caused acceleration of the natural processes.