Summary:
- The article discusses the recent scientific discoveries about "ghost populations" - ancient human groups that left genetic traces in modern populations but did not leave behind any archaeological evidence.
- Researchers have found evidence of interbreeding between modern humans and other archaic human species, such as Neanderthals and Denisovans, which has shaped the genetic makeup of many present-day populations.
- These "ghost populations" provide valuable insights into the complex history of human evolution and the interactions between different human species, helping scientists to better understand the origins and diversity of modern humans.