History knows examples of honey preservation for decades, centuries and even millennia. Historically, there has been debate around the turn of previous decades, centuries and millennia. Ancient Egypt saw a succession of thirty dynasties spanning three millennia. Over the following millennia, civilizations developed across the world. Alchemy encompasses several philosophical traditions spanning some four millennia and three continents. Various human cultures have for millennia depicted pinnipeds. It would be irreversible on a timescale between decades and millennia. Ayurveda therapies have varied and evolved over more than two millennia. Humans have practiced capital punishment by beheading for millennia. Egyptian culture boasts five millennia of recorded history. The Pacific Northwest has been occupied by a diverse array of indigenous peoples for millennia. The core settlement has a history spanning four millennia. Farmers have practiced soil conservation for millennia. Irrigation began in Nubia some time between the third and second millennia BCE. Human settlement of Micronesia began several millennia ago.