Eric Miller, BLM Alaska Fire Service Fire Ecologist, describes the 2017 re-survey of the 2007 mega-fire on the North Slope of Alaska. He shows surprising findings with regard to subterranean ice feature degradation, vegetation changes and recovery, shrubbification, and surface topology changes. More importantly, he highlights brand-new data which shows how these changes may last hundreds of years, or maybe threshold changes, in Alaska's warming arctic tundra.