Pamhenderekedzo yeAlaska, chidimbu chembwafu pfupa chaive chemakore zviuru gumi. Nakhodka yakava chiratidzo chakazivikanwa chekuvapo kwembwa dzakadzikiswa muNorth America. Inogona kushanda seyokupokana kutsva mukuda kwenzvimbo dzekutama kwenyika, zvichienderana nekugadziriswa kwechiedza chakaitika kubva kuchamhembe kusvika kumaodzanyemba, kubva kumagedhi eBinesi paganda rePacific. About Nakhodka anoudzwa mukubudiswa kwekutsigira kweYunivhesiti yeNew York muBuffalo.
Iyo hypothesis inoratidza kuti matunhu ari kure negungwa, vanotama vakafambisa kuwanda kwezasi, vachiuya kumucheto kwegwenzi, ndokuzovhara chikamu chetironi. Ini ndinokwikwidza iyo vhezheni neiyo iyo yekuvandudza yakafamba kuburikidza neiyo yakakuvadzwa ibwe rekununurwa kwedambudziko uye rakadzika mumagariro, uko kufamba kwezasi kwatotanga. Mukufarira kwekutama kwemahombekombe, anoverengeka anowana zvinoratidzwa, kusanganisira tsoka dzakasara makore gumi nematatu apfuura pachitsuwa cheKalvert pamhenderekedzo yeCanada.
Inotsigira iyo hypothesis uye iyo inotaurwa mune chinyorwa yakagadzirirwa kuburitswa kwekuburitswa kweRoyal Sosaiti B. Ichi chidimbu cheiyo femi yeimbwa, inowanikwa kutanga kwa2000 muSouth a Alaska, pa iyo nyanzvi yekumabvazuva kwechitsuwa cheWrangl. Muenzaniso wacho waive wakanyorwa pamakore zana nemakumi mairi - kupera kwezera rekupedzisira rece. Zvinotendwa kuti kusimba kwembwa kwakaitika muSiberia kwenguva refu kusati kwagara kweAmerica uye vaigona kuoneka pano nevatambi vekutanga.
Charlotte Lindqvist (Charlotte Lindqvist) uye vatinoshanda navo vakakwanisa kutsakatisa iyo yakazara Mitokrial genome uye enzanisa ne genioma yemamwe imbwa dzazvino uye dzekare. Nenzira iyi, mutsara wemhuka iyi wakanyengerwa kune imbwa dzaigara muSiberia munguva yekupedzisira glacier nguva. Nekudaro, mukana wekuti mhuka iyi yakazova muAmerican zvisingaite uye yakaenda ipapo, isina vanhu.
Mune imwe chete cave cave (lawer bako), kwawakawanikwa pfupa, vakawana vanhu vakasara, kunyangwe gare gare. Nekudaro, zvinoenderana nemasayendisiti, izvi zvinoramba zviripo zvatova kuratidza kuti bako riri mune izvo epochs raive rakagadzikana pakugadzirisa. Mukuwedzera, tarisiro dzekutanga dzevanhu varipo mumapako ari padyo. Saka, kunyangwe mirairo yakananga pane chokwadi ichi yaive kumba, kwete, kazhinji inogona kuzivikanwa chaizvo. Izvo zvakafanana zvisina kunanga zvinoratidza kuti isotopic kuumbwa kwemuenzaniso. Anopupurira kune vanodya vakapfuma nehove, nyama yegungwa uye kunyange whales.
Kunobva: Naked Science