Caave of Swimmers

The Cave of Swimmers is a cave in southwest Egypt, near the border with Libya, in the mountainous Gilf Kebir region of the Sahara Desert. It was discovered in October 1933 by the Hungarian explorer László Almásy. It contains rock painting images of people swimming estimated to have been created 10,000 years ago during the time of the most recent Ice Age.
Almásy devoted a chapter to the cave in his 1934 book The Unknown Sahara. In it he postulates that the swimming scenes are real depictions of life at the time of painting and that there had been a change in climate since that time. This theory was so new at that time that his first editor added several footnotes, to make it clear that he did not share this opinion.