Abantu bayakwazi ukubekezelela amazinga okushisa aphansi kakhulu ngaphandle kwemithombo yokushisa

Abaphenyi bahlaziya izimo zokuphila zabantu basendulo bakwaNtshonalanga Yurophu eMiddle Pleistocene

Abasebenzi baseNational Center ukuze bacwanishwe abantu kanye ne-Cologne University baveze ukuqina emazingeni okushisa aphansi noma ngaphandle kwemithombo yokushisa. Kulokhu, ochwepheshe bahlaziye izimo zezulu zesikhathi se-Pleistocene ephakathi. Imiphumela yomsebenzi yanyatheliswa ejeni le-Journal of Evolution.

Isikhathi se-Pleistocene esiseceleni, esihlala eminyakeni eyizinkulungwane eziyi-125-780 edlule, sibonakaliswa ukuguquguquka kwesimo sezulu ngezikhathi ezithile, kanye nezigaba ezipholile. Abaphenyi basebenzise amamephu we-paleothemermer ukusungula umbuso wokushisa lapho amadlozi okhokho aphoqelelwa ukuba aphile ngesikhathi sezigaba ezibandayo. Ososayensi bakwazile ukuthola umbuso wokushisa endaweni yezingosi ezingama-68 lapho ubukhona bomuntu wakudala lwabhaliswa khona.

I-modeling thermoregulation ivunyelwe ososayensi ukuba balinganise ukuguqulwa okungaba khona kokhokho babantu kumazinga aphansi. Imodeli enjalo ilingisa ukulahleka kokushisa okugcinwe ngesikhathi sokulala. Ukuhlaziywa kuveze ukuthi abantu bekumele babekezelele amazinga okushisa aphansi hhayi kuphela ngezigaba ezibuthaka, kodwa nasekwenzeni isimo sezulu esithambile.

Lokho abantu ababengakwazi ukubekezelela izimo ezinzima ezinzima, kunzima ngathi ukuthi sicabange ukuthi uma ukhumbula ukuthi ubufakazi bokusebenzisa umlilo eYurophu ngalesi sikhathi buqabukela. Eqinisweni, abacwaningi abaningi bakholelwa ukuthi abakwazanga ukukhiqiza futhi basebenzise umlilo ngokujwayelekile, - uJesu uRodriguez, isisebenzi seNational Center ngocwaningo lwabantu, umbhali ophathelene nomsebenzi wesayensi.

Imodeli yezibalo yasiza ososayensi ukuthi bahlole ukusebenza kwamasu amabili okuhloswe ngalo ukulwela ukubanda. Ngakho-ke, ukuhlolwa komphumela ofaka umkhawulo wesembozo soboya, ungqimba oluwugqinsi lwe-lipid, kanye nesizukulwane sokushisa ngenxa yezinqubo ze-metabolic emzimbeni. Imodeli yabheka ukulahlekelwa ukushisa ngenxa yokugcwala komoya. Kwavela ukuthi ukunxephezela umkhawulo wokuphendula kwe-metabolic emazingeni okushisa abandayo ebusuku, abantu basendulo balala, basongelwa ngotshani, bathola nezindawo ezivikelwe umoya.

Phambilini, insizakalo yezindaba ephakathi itshele ukuthi ososayensi bakwazi ukuthola isizathu esiyinhloko sokuguga kwengqondo.