50,000–40,000 BP

The Late Pleistocene is a geochronological age of the Pleistocene Epoch and is associated with Upper Pleistocene (or Tarantian) stage rocks. The beginning of the stage is defined by the base of the Eemian interglacial phase before the final glacial episode of the Pleistocene 126,000 ± 5,000 years ago. Its end is defined at the end of the Younger Dryas, some 11,700 years ago. The age represents the end of the Pleistocene epoch and is followed by the Holocene epoch.

Much of the Late Pleistocene age was dominated by glaciations, such as the Wisconsin glaciation in North America and the Weichselian glaciation and Würm glaciation in Eurasia. Many megafauna became extinct during this age, a trend that continued into the Holocene. The Late Pleistocene contains the Upper Paleolithic stage of human development, including the out-of-Africa migration and dispersal of anatomically modern humans and the extinction of the last remaining archaic human species.

North America
According to George Carr Frison, Bison occidentalis and Bison antiquus, an extinct subspecies of the smaller present-day bison, survived the Late Pleistocene period, between about 12 and 11 ka ago. Plains and Rocky Mountain First Nations depended on these bison as their major food source. Earlier kills of camels, horses, and muskoxen found at Wally's beach were dated to 13.1–13.3 ka B.P.

Göbekli Tepe
Göbekli Tepe is the only known major Pleistocene architectural construction. It was used into the earliest Holocene epoch. The details of the structure's function remain a mystery. It was partially excavated by a German archaeological team under the direction of Schmidt from 1996 until his death in 2014.

Earth
It is a quiet time on Earth. The Guardian is in a passive mode. Homo Sapiens The Vakersaki, appear and are the motivation for the structures at Göbekli Tepe.

Vakersaki
A mysterious humanoid species assumed to be associated with the Seeders. Appears on Earth for a short period of time and never to be seen or encountered again. The Ult and the Wurgus remember the Vakersaki.

The Nul
Nul-Nul welcomes the second grey leader, who has a tremendous influence on Nul society.

The Saresii
Saresii destroys all their space-faring technology and prohibits any space exploration, past their own system. The Silver Veils, a group of intellectuals hide a remaining part of the Saresii war fleet in the Hollow Mountains of Kasimi