The Comet Research Group and I developed this presentation on the Younger Dryas Impact. I have long thought such a show should be made "open source" so any interested science geek could give the presentation to a local astronomy or geology club, rotary, classroom, or whomever you like. Or, to just to review the subject in a linear graphical nature by yourself. The YDI is multifaceted and multidisciplinary theory which requires a large amount of information and graphics needed to present properly. Frankly it is very hard to develop a single all inclusive presentation on the subject. I'd like to think this effort is the current state of the art, so to speak. It should be modified and improved as the evidence for the cataclysm continues to pile up. And I welcome your suggestions for modification and improvement. But for now, have at it, and let me know what you think. I plan to "annotate" it when I have the time. Please note I have also uploaded a somewhat more up to date but abbreviated presentation on this site. They will be combined at some point.