And this was at a time when we had No Coal burning Power Stations ...Or Motor Cars !!!Ancient Aboriginal stories preserve history of a rise in sea level
https://theconversation.com/ancient-aboriginal-stories-preserve-history-of-a-rise-in-sea-level-36010
https://www.scientificamerican.com/article/ancient-sea-rise-tale-told-accurately-for-10-000-years/
https://www.sci.news/othersciences/linguistics/science-aboriginal-stories-australia-03272.html
