That 1500 Year Thing. "Climate Deniers S. Fred Singer and Dennis Avery make their living by confusing and obfuscating the science of climate change. Their latest book, 'Unstoppable Global Warming every 1500 Years' is a compendium of vintage as well as cutting edge climate crocks. Let's find out who they are and how they are bamboozling their audience."
(Dansgaard-Oeschger event greenland antarctica ice cores up in the north down in the south - bipolar seesaw between northern n southern hepispheres)