Sopra this respect, the Qesem hominins may play an important role

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Sopra this respect, the Qesem hominins may play an important role

Durante summary, the notion that shifts sopra human life histories, accompanied by improved intelligence, are an evolutionary response esatto a dietary shift towards high-quality food resources that are difficult to acquire has already been suggested by Kaplan . Our model is innovative in that it suggests per mechanism for such per dietary shift that could have propelled hominins sicuro per new evolutionary tirocinio.

Conclusion

For more than two decades per view dominated anthropological discussions that all modern human variation derived from Africa within verso relatively recent chronological framework. Recent years challenged this paradigm with new discoveries from Europe, Pendio, and other localities, as well as by new advances con theory and methodology. These developments are now setting the tirocinio for a new understanding of the human story per general and the emergence of modern humans sopra particular (e.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 (e.g., , , , ), lends support preciso the notion of assimilation (di nuovo.g., ) between populations migrating “out of Africa” and populations already established in these parts of Eurasia.

It is still premature onesto indicate whether the Qesem hominin ancestors evolved mediante Africa prior to 400 kyr , developed blade technologies , , and then migrated esatto the Levant esatto establish the new and unique Acheulo-Yabrudian cultural complex; or whether (as may be derived from our model) we face per local, Levantine emergence of a new hominin lineage. The plethora of hominins con the Levantine Middle Paleolithic fossil primato (Qafzeh, Skhul, Zuttiyeh, Tabun) and the fact that the Acheulo-Yabrudian cultural complex has giammai counterparts sopra Africa may hint in 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 onesto the emergence of modern human populations , , .

It should not ad esempio as per surprise that H. erectus, and its successors managed, and per fact evolved, onesto obtain verso substantial amount of the densest form of nutritional energy available in nature – fat – puro the point that it became an obligatory food source. Animal fat was an essential food source necessary durante order puro meet the daily energy expenditure of these Pleistocene hominins, especially taking into account their large energy-demanding brains. It should also not quale as a surprise that for verso predator, the disappearance of per major prey animal may be per significant reason for evolutionary change. The elephant was per uniquely large and fat-rich food-package and therefore per 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 sicuro have triggered the evolution of per species that was more adept, both physically and mentally, sicuro obtain dense energy (such as fat) from per higher number of smaller, more evasive animals. The concomitant emergence of a new and innovative cultural complex – the Acheulo-Yabrudian, heralds per new attrezzi of behavioral habits including changes mediante hunting and sharing practices , , that are relevant to our model.

If indeed, as we tried preciso spettacolo, the dependence of humans on fat was so fundamental puro their existence, the application is made possible, perhaps after some refinement, of this proposed bioenergetic model esatto the understanding of other important developments in human evolutionary history

Thus, the particular dietary developments and cultural innovations joined together at recensione flirthookup the end of the Lower Paleolithic period con the Levant, reflecting verso link between human biological and cultural/behavioral evolution.

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