Mass Migration Security, page-4

1. ions ...
2. https://www.pbs.org › wgbh › nova › article › climate-change-may-have-brought-ancient-egypt-to-its-knees

   Climate Change May Have Brought Ancient Egypt to Its Knees

   Climate Change May Have Brought Ancient Egypt to Its Knees. New analysis of pollen grains and radiocarbon dating suggests that climate change played a major role in Ancient Egypt's downfall ...