image: Reconstruction of early spread of modern humans outside Africa. The tree shows the divergence of the Aboriginal Australian (ABR) relative to the CEPH European (CEU) and the Han Chinese (HAN) with gene flow between aboriginal Australasians and Asian ancestors. Purple arrow shows early spread of the ancestors of Aboriginal Australians into eastern Asia ~62,000 to 75,000 years B.P. (ka BP), exchanging genes with Denisovans, and reaching Australia ~50,000 years B.P. Black arrow shows spread of East Asians ~25,000 to 38,000 years B.P. and admixing with remnants of the early dispersal (red arrow) some time before the split between Asians and Native American ancestors ~15,000 to 30,000 years B.P. YRI, Yoruba. This image relates to an article that appeared in the Sept. 22, 2011, issue of Science Express, published by AAAS. The study, by Dr. M. Rasmussen of the Centre for GeoGenetics, Natural History Museum of Denmark and colleagues was titled, "An Aboriginal Australian Genome Reveals Separate Human Dispersals into Asia.” view more
Credit: Image © <i>Science</i>/AAAS