Waa maxay sababta cabbirka maskaxdu ay uga yaraadeen kuwii hore?

Waa maxay sababta cabbirka maskaxdu ay uga yaraadeen kuwii hore?

Horumarka maskaxda bini'aadamka ayaa muddo dheer lagu tiriyaa calaamadda ugu weyn ee lagu garto kororka garaadka aadanaha iyo in uu ka dambeeyo xukunka meeraha, iyadoo labadii milyan ee sano ee ugu dambeysay ee horumarka bani'aadamka lagu tilmaamay kororka xajmiga maskaxdiisa. ku dhawaad ​​afar jeer.

Laakiin cadaymo badan oo soo kordhay dhawaan ayaa tilmaamaya in maskaxda bini'aadamka ay isku bedeshay hab lama filaan ah, hoos u dhac ku yimid cabbirka wakhti ka dib dhamaadka da'dii barafka ee ugu dambeysay, saynisyahano ayaa shaaca ka qaaday.

Marka la eego arrintan, Jeremy de Silva, oo ah borofisar cilmiga cilmiga qadiimiga ah ee Dartmouth College, ayaa sharraxay in dadka intooda badani ay aaminsan yihiin in korriinka maskaxdu ay u dhacdo qaab toosan, marka ay koraan, ka dibna ay xasiliyaan oo joojiyaan mar dambe, taas oo muujinaysa in tani aysan run ahayn. , maadaama uu qofku lumay unug maskaxeed oo u dhigma cabbirka hal liin.

Si loo ogaado, koox cilmi-baarayaal ah oo uu hoggaaminayo de Silva waxay adeegsadeen isku-dhafka fosil iyo xogta muunad casri ah si ay u go'aamiyaan in luminta maadada cawl ay dhacday intii u dhaxaysay 3000 iyo 5000 oo sano ka hor, sida laga soo xigtay cilmi-baaris lagu daabacay Juunyo joornaalka Frontiers in Ecology iyo Evolution

Tayada bulshooyinka ayaa door ka qaatay

Dad badan oo cilmi-nafsiga ku takhasusay ayaa markii hore u qaatay in isbeddelku uu ku soo beegmay markii ay soo ifbaxeen hab-dhaqannada beeraha qiyaastii 10000 oo sano ka hor, iyo isbeddel caalami ah oo ka baxay ugaarsiga iyo isu-ururinta.

Iyadoo taariikhaha ugu dambeeyay ee kooxda DeSilva ay tilmaamayaan xilliyadii hore ee ilbaxnimooyinka qadiimiga ah ee Waqooyiga Afrika, Bariga Dhexe, iyo Koonfurta Ameerika, bulshooyin adag oo ay aaminsan yihiin in ay door ku lahaayeen dhimista maskaxda.

Saynis yahanadu waxa ay sheegeen in maskaxda bini'aadamku ay isku qiyaas ahaan celcelis ahaan, ilaa 1450 sentimitir kuyuubik ah, 150 sano ee la soo dhaafay, sida uu qabo Wall Street Journal.

Halka celcelis ahaan uu si degdeg ah hoos ugu dhacay ilaa 10%, ama ilaa 150 senti mitir kuyuubik, dhawrkii kun ee sano ee la soo dhaafay.

tirada dadka oo yaraatay

Kooxda DeSilva waxay ogaatay in aanay ahayn oo kaliya in cabbirka maskaxda bini'aadamku uu hoos u dhaco guud ahaan, laakiin sidoo kale waxay hoos u dhacday marka loo eego cabbirka jidhka, taas oo soo jeedinaysa in hoos u dhaca cabbirka maskaxdu aanu ahayn kaliya wax soo saarka jirkeena oo sii yaraanaya.

Cilmi-baadhayaashu waxay soo jeediyeen in baahideenna si aan u ilaalino maskax weyn, si aan ula soconno macluumaadka ku saabsan cuntada, xiriirka bulshada, ugaarsiga iyo deegaankeena, ayaa sidoo kale laga yaabaa inay hoos u dhacday dhowr kun oo sano ee la soo dhaafay sababtoo ah waxaan awoodnay inaan ku kaydino macluumaadka dibadda ee xubnaha kale. ee wareegyadayada bulsheed, magaalooyinka iyo kooxaha bulshada.

Isbeddelka ayaa sidoo kale laga yaabaa in lagu xoojiyo isticmaalkayada buugaagta, qalabka shakhsi ahaaneed iyo internetka oo ah ilo xogeed oo isku mid ah, sida uu qabo Chris Stringer, paleontologist oo ka tirsan Matxafka Taariikhda Dabiiciga ah ee London, iyo Christoph Koch, oo ah neerfayaasha machadka Allen , machad ku yaal Seattle.

Inkasta oo celceliska dhererka bini'aadamka uu u muuqdo inuu kordhay dhowrkii qarni ee la soo dhaafay, Stringer wuxuu sheegay in noocyadayagu ay noqdeen kuwo aad u gaaban, fudud oo yar XNUMX oo sano ee la soo dhaafay ka dib markii cimiladu kululaato, iyo cabbirka maskaxda ayaa hoos u dhacay.

"Laakiin tani ma noqon karto sheekada oo dhan," ayuu hadalkiisa ku soo gabagabeeyay.

Maguy Farah saadaasha horoscope ee sanadka 2023