Eemian, once called the Eemian Interglacial period,'s temporally equivalent to the Sangamonian Stage (sensu stricto) in North America, the Ipswichian Stage in the UK, and the Riss-Würm interglacial in the Alps. This stage's second-to-latest interglacial period of the Ice Age. It began about 130,000 years ago. Changes in orbital parameters from today (greater obliquity and eccentricity, and perihelion), known as the Milankovitch cycle, probably led to greater seasonal temperature variations… (More on Eemian)