A new scientific paper is claiming that early hunter-gathers may have been responsible for a cooling episode known as the "Younger Dryas event". The thinking goes that once human hunter-gatherers caused the extinction of North American megafauna like mammoths and woolly rhinos, the resulting drop in atmospheric methane triggered the shift. Sharp readers will note the author appears to have used one very controversial idea (that humans were the sole cause of megafauna extinction) to prop up a new controversial idea about climate change. This makes my, "smells like political spirit" detector go all itchy around the corners. Then again, I haven't showered yet, so it could just be, you know, fleas or something.