A PBS series 'Human' explores the history of humanity and how *Homo sapiens* became the dominant species on Earth, highlighting the existence of multiple human species and the importance of cooperation in our success.
The article discusses the existence of over 20 early human species that coexisted with Homo sapiens, their potential reasons for extinction (climate change, competition, interbreeding), and the current understanding of human evolution.
This study uses ecological niche modeling to reconstruct the palaeodistribution of Neanderthals and anatomically modern humans during Marine Isotope Stage 5, identifying the Zagros Mountains as a potential contact and interbreeding zone.
