I've spent considerable time and energy recently blogging about the claims of a chemical engineer named Martin Sweatman, who has published two papers and now a book about his interpretation of the art of Gobekli Tepe, Catal Huyuk, and the entire Paleolithic as astronomical notation, and support for the Younger Dryas Impact Hypothesis. His hubris is extraordinary, but his contempt for archaeology is absolutely typical. I thought you guys might find it of interest. Here is a link to my most recent (and hopefully final) critique, but the paper also contains links to his papers and to my previous critiques.
[www.skepticink.com]