sentences:  According to various studies, the MIS 11 interglacial period was longer than the other interglacial stages.The sustained interglacial warmth may have lasted as long as it did, because orbital eccentricity was low and the amplitude of the precessional cycle diminished, resulting in several fewer cold substages during this period and perhaps also induced abrupt climate change at MIS 12–11 transition, the most intense of the past 500 kyrs.It is notable that MIS 11 developed just after one of the most “heavy” Pleistocene δ glacials (MIS 12).