Adaptions were found for resisting UV radiation (e.g.
in the Kalahari, and for bitter tastes providing better capacity to tell poisonous plants.
Unlike the inbred genetic profile of the Altai Neanderthals (Prüfer et al doi:10.1038/nature12886) and those from Vindija Cave in Croatia (Prüfer et al doi:10.1126/science.aao1887), genetic sequencing of ancient individuals the Sungir group of upper paleolithic remains (Sikora et al.
doi:10.1126/science.aao1807) dating from around 34,000 years ago, shows they lived in groups with few close relatives, thus limiting inbreeding.
Khoisan people then diverged into two genetically distinct populations around 200,000 years ago.
Right: Population movements deduced from ancient DNA (Soglund et al. There has also been an admixing of Western Eurasian non-African genomes firstly into Ethiopia 2,700–3,300 years ago and eventually down ino the Khoe San between 1,800 and 900 years ago, where Neanderthal genes due to the Eurasian Neanderthall introgression showed up in a genetic assay (Pickrell et al.doi:10.1073/pnas.1313787111).
A consistent and powerful hypothesis about human emergence is that the complementary reproductive strategies of females and males led to evolutionary gender paradox in early human societies and hence cultural complexity based on sexual relationships driven to a considerable extent by female reproductive choice.
The males, to achieve reproductive success needed to compromise their competition to fit with the cooperative nature of the human group, centered on the family and gathering and social relationships with the females.
Recent studies have shown that the nearly identical genes of humans and chimps produce essentially the same proteins in most tissues, except in parts of the brain, where certain human genes are more active and others generate significantly different proteins through alternative splicing of gene transcripts.The insertions and deletions of the million or so Alu elements in the human genome (p 332) are particularly useful, as the most active sub-population of about 1000 Alu is actively transcribing and undergoing rapid change.A subpopulation of Alu are capable of generating new coding regions (exons), when inserted into non-coding introns between spliced sections of a translated m RNA, because one base-pair change within Alu leads to formation of a new exon reading into the surrounding DNA.Our divergence from other primates may thus be due in part to alternative splicing.Fig 29g: Left: Southern African ancient genomes estimate modern human divergence to 350,000 years ago, with a genetic split between the Khoisan and other Africans 260,000 years ago, shortly after humankind's origins and around the time of the Florisbad individual.