Per summary, the notion that shifts mediante human life histories, accompanied by improved intelligence, are an evolutionary response onesto per dietary shift towards high-quality food resources that are difficult preciso acquire has already been suggested by Kaplan . Our model is innovative in that it suggests a mechanism for such a dietary shift that could have propelled hominins to verso new evolutionary stage.
Conclusion
For more than two decades verso view dominated anthropological discussions that all modern human variation derived from Africa within a relatively recent chronological framework. Recent years challenged this paradigm with new discoveries from Europe, Discesa, and other localities, as well as by new advances mediante theory and methodology. These developments are now setting the stage for a new understanding of the human story in general and the emergence of modern humans con particular (ed.g., , , , , , , , , , , , , , , , , ). Analysis of their dental remains suggests verso much deeper time frame between at least some of the ancestral populations and modern humans than that which is assumed by the “Out of Africa” model. This, combined with previous genetic studies (addirittura.g., , , , ), lends support puro the notion of assimilation (ancora.g., ) between populations migrating “out of Africa” and populations already established con these parts of Eurasia.
It is still premature onesto indicate whether the Qesem hominin ancestors evolved con Africa prior sicuro 400 kyr , developed blade technologies , , and then migrated preciso the Levant onesto establish the new and unique Acheulo-Yabrudian cultural complex; or whether (as may be derived from our model) we face a local, Levantine emergence of per new hominin lineage. The plethora of hominins sopra the Levantine Middle Paleolithic fossil record (Qafzeh, Skhul, Zuttiyeh, Tabun) and the fact that the Acheulo-Yabrudian cultural complex has in nessun caso counterparts per Africa may hint durante favor of local cultural and biological developments. This notion gains indirect support from the Denisova finds that raise the possibility that several different hominin groups spread out across Europe and Oriente for hundreds of thousands of years, probably contributing puro the emergence of modern human populations , , .
It should not che tipo di as per surprise that H. erectus, and its successors managed, and con fact evolved, onesto obtain a substantial amount of the densest form of nutritional energy available con nature – fat – to the point that it became an obligatory food source. Animal fat was an essential food source necessary durante order sicuro meet the daily energy expenditure of these Pleistocene hominins, especially taking into account their large energy-demanding brains. It should also not che as per surprise that for a predator, the disappearance of per major prey animal may be verso significant reason for evolutionary change. The elephant was verso uniquely large and fat-rich food-package and therefore a most attractive target during the Levantine Lower Palaeolithic Acheulian. Our calculations show that the elephant’s disappearance from the Levant just before 400 kyr was significant enough an event esatto have triggered the evolution of per species that was more adept, both physically and mentally, sicuro obtain dense energy (such as fat) from verso higher number of smaller, more evasive animals. The concomitant emergence of per new and innovative cultural complex – the Acheulo-Yabrudian, heralds a new set of behavioral habits including changes per hunting and sharing practices , , that are relevant onesto our model.
If indeed, as we tried onesto esibizione, the dependence of humans on fat was so fundamental preciso their existence, the application is made possible, perhaps after some refinement, of this proposed bioenergetic https://datingranking.net/it/xcheaters-review/ model onesto the understanding of other important developments con human evolutionary history
Thus, the particular dietary developments and cultural innovations joined together at the end of the Lower Paleolithic period con the Levant, reflecting a link between human biological and cultural/behavioral evolution.