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

Ngày đăng : 24/07/2022

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

Con summary, the notion that shifts con human life histories, accompanied by improved intelligence, are an evolutionary response https://datingranking.net/it/farmers-dating-site-review/ sicuro verso dietary shift towards high-quality food resources that are difficult puro acquire has already been suggested by Kaplan . Our model is innovative sopra that it suggests per mechanism for such verso dietary shift that could have propelled hominins esatto a new evolutionary stage.


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, Declivio, 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 con general and the emergence of modern humans sopra particular (addirittura.g., , , , , , , , , , , , , , , , , ). Analysis of their dental remains suggests a 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 (ed.g., , , , ), lends support sicuro the notion of assimilation (ed.g., ) between populations migrating “out of Africa” and populations already established con these parts of Eurasia.

It is still premature esatto indicate whether the Qesem hominin ancestors evolved sopra Africa prior puro 400 kyr , developed blade technologies , , and then migrated onesto the Levant preciso 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 a new hominin lineage. The plethora of hominins durante the Levantine Middle Paleolithic fossil primato (Qafzeh, Skhul, Zuttiyeh, Tabun) and the fact that the Acheulo-Yabrudian cultural complex has giammai counterparts in Africa may hint con 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 Levante for hundreds of thousands of years, probably contributing esatto the emergence of modern human populations , , .

It should not che as a surprise that H. erectus, and its successors managed, and con fact evolved, preciso obtain per substantial amount of the densest form of nutritional energy available mediante nature – fat – sicuro the point that it became an obligatory food source. Animal fat was an essential food source necessary per order to meet the daily energy expenditure of these Pleistocene hominins, especially taking into account their large energy-demanding brains. It should also not che as verso surprise that for a predator, the disappearance of a major prey animal may be verso significant reason for evolutionary change. The elephant was a uniquely large and fat-rich food-package and therefore a most attractive target during the Levantine Lower Palaeolithic Acheulian. Our calculations spettacolo that the elephant's disappearance from the Levant just before 400 kyr was significant enough an event onesto have triggered the evolution of a species that was more adept, both physically and mentally, to obtain dense energy (such as fat) from per higher number of smaller, more evasive animals. The concomitant emergence of verso new and innovative cultural complex – the Acheulo-Yabrudian, heralds verso new batteria of behavioral habits including changes durante hunting and sharing practices , , that are relevant sicuro our model.

If indeed, as we tried esatto 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 preciso the understanding of other important developments mediante human evolutionary history

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

Dương Xuân Quả (Năm Nhã)

Hệ thống cánh quạt siêu tiết kiệm điện năng và lò đốt tiết kiệm nhiên liệu đốt;

Nguyên liệu đốt đa dạng như: trấu, củi trấu, củi cây, than đá, vỏ cà phê, cùi bắp;

Sấy gạo đạt tiêu chuẩn xuất khẩu, gạo không ẩm vàng, tỷ lệ tấm đạt 3-5%, tỷ lệ hạt giống nẩy mầm từ 95 -97%;​

Sấy được nhiều loại nông sản như: lúa, bắp, cà phê, cacao, ớt trái, vỏ đầu tôm, sắn, khoai mì, thảo dược...

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