Multă vreme, oamenii de știință nu înețelgeau de ce aveau oamenii de Neanderthal nasul mai mare, faţa lată şi plată și fălcile proeminente. Dar analizăând în pralalel o serie de modelelor tridimensionale ale unor cranii aparţinând omului de Neanderthal, Homo sapiens şi presupusului strămoş comun al acestora, Homo heidelbergensis, o echipă internaţională de cercetători a scos în evidenţă evoluţii distincte ale aparatului respirator.
Concluzia a fost că nasul omului Neanderthal şi cel al omului modern „încălzea şi umidifica aerul într-un mod mult mai eficient decât cel al lui Homo heidelbergensis, sugerând că aceste două specii au evoluat pentru a rezista mai bine la climatul rece şi/sau uscat”.
Mai mult, cercetătorii au concluzionat că fosele nazale ale neanderthalienilor le permiteau să inhaleze ”mult mai mult aer” în comparaţie cu rudele lor, caracteristică ce ar putea fi explicată prin cerinţele energetice mai mari determinate de corpurile robuste şi de activităţile acestora în domeniul vânătorii.
Studiul arată că activitatea fizică a omului de Neanderthal făcea ca acesta să aibă nevoie de aproape 4.480 de calorii pe zi pentru a supravieţui în timpul iernii europene, în timp ce un bărbat de astăzi consumă aproximativ 2.500 de calorii.
„Evoluţia specială a morfologiei faciale a neanderthalienilor provine, cel puţin parţial, din adaptarea sa la frig”, se arată în studiupotrivit studiului.
Oamenii de Neanderthal au apărut în Europa, Asia Centrală şi Orientul Mijlociu în urmă cu 200.000 de ani. Ei au dispărut acum aproximativ 30.000 de ani.
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