>>22410625>We find that the lower bound of the admixture time is further back than the simulated split between CEU and YRI (2155 generations ago), providing some evidence in favor of a pre-Out-of-Africa event. This model suggests that many populations outside of Africa should also contain haplotypes from this introgression event, though detection is difficult because many methods use unadmixed outgroups to detect introgressed haplotypes [Browning et al 2018, Skov et al 2018, Durvasula and Sankararaman, 2019] (5, 53, 22). It is also possible that some of these haplotypes were lost during the Out-of-Africa bottleneckAlso, that archaic ancestry/ghost DNA in Sub-Saharan African is from Homo Bodoensis, which was a sister lineage to Homo Sapiens. Homo Naledi (which split very early) isn't the source but something which split after Neanderthal/Heidelbergensis split happened is the the source, so it's probably Homo Bodoensis/Rhodiensis which is the source and Bodoensis were like a bit distant Homo Sapiens (not Erectus or Neanderthal). Erectus don't lived side by side with modern humans in Africa, the last known Homo Erectus specimens were dated to around 800,000 years ago in the Africa. They survived for much longer in Europe and Asia, only going extinct in Europe around 400kya and Asia around 110kya.
