Dr. Ella Al-Shamahi on Instagram discusses how around 300,000 years ago an unknown (“ghost”) DNA was introduced to human DNA. This DNA is believed to be linked to neurogensis and gave human DNA a “software upgrade.” The paper she referenced in the video is in Nature Genetics by R. Durbin, et al, “A structured coalescent model reveals deep ancestral structure shared by all modern humans” submitted by /u/GrandEscape [link] [comments]