The Tardiglacial is the climatic period which marked the end of the last glacial, the Weichselian. It coincided with the first signs of a warming climate and deglaciation following the Last Glacial Maximum (around 20,000 years ago), the coldest period of the last glacial. In north-west Europe the Tardiglacial was marked by strong and fast oscillations in climate, between colder and more temperate periods, with average annual variations in temperature between these periods of the order of 5°C. The archaeological remains found at Étiolles date from the Tardiglacial, but due to imprecise dating have not yet been attributed to a specific climate. This is one of the subjects of the research taking place on the site.