Evolutionary BiologybioRxiv
Neanderthal-Denisovan ancestors interbred with a distantly-related hominin
A. R. Rogers, N. S. Harris, A. A. Achenbach
The paper documents the earliest known interbreeding between ancient human populations and an expansion out of Africa early in the middle Pleistocene.
DOI 10.1126/sciadv.aay5483