Asayansi akukhulupirira kuti apeza zinthu zakale zakale kwambiri padziko lapansi, zomwe mwina zidakhalapo zaka 3.75 biliyoni zapitazo. Izi zikatsimikiziridwa, zitha kukayikira lingaliro lathu la moyo Padziko Lapansi ndikusintha mbiri.
Dominic Papineau, pulofesa wothandizira wa geochemistry ndi astrobiology pa University College London, adapeza zotsalira zakale kumpoto kwa Québec, Canada (UCL). Papineau adazindikira izi paulendo wopita ku Quebec's Nuvvuagittuq Supracrustal Belt mu 2008.
Mu 2017, pulofesa wothandizana nawo ndi ofufuza a UCL adatulutsa nkhani mu Nature ponena kuti timinofu tating'onoting'ono tating'onoting'ono tomwe tapezeka m'miyala iyi tawonetsa kuti mwina tapangidwa ndi mabakiteriya.
Ananenanso za kuthekera kwa moyo wakale kuposa momwe anthu amaganizira m'mbuyomu. Ngakhale anena kuti miyalayo mwina zaka 3.75 biliyoni, pali malingaliro ambiri kuti akhoza kukhala achikulire kwambiri. Ofufuzawo amakayikira ngati angakhale ndi zaka 4.2 biliyoni. Zimenezo zingakhale zosakhulupiririka.
Iye ndi gulu lake anafalitsa kafukufuku wina m'buku lakuti Science Advances limene linanena kuti 'zapadera' zomwe atulukirazi zikusonyeza 'tizilombo tating'onoting'ono tosiyanasiyana pa Dziko Lapansi Lapansi lomwe lingakhale lofanana ndi mapulaneti ena, kuphatikizapo Mars.'
Polankhula ndi Vice, Papineau adatinso: "Pazonse, ndizosangalatsa kwambiri chifukwa sikuti timangopanga njira yasayansi yokhala ndi maumboni angapo odziyimira pawokha kuti tilimbikitse chilengedwe, komanso timakana zomwe zimadziwika kuti abiotic".
“Ma microfossils amenewa angakhaleponso m’malo ena a mapulaneti akale chifukwa ngati chiyambi cha moyo chimatenga nthawi yochepa kuti chikhalepo, ndipo muli ndi vuto locholoŵana chotere, ndiye kuti zimabweretsa mafunso ambiri anzeru anzeru okhudza kuthekera komwe moyo ungakhale nawo. adawuka ndikusiya zizindikiro zamtunduwu."
"Zimapanga mipata yambiri yosinthira nthawi kuti tidziwe momwe moyo unayambira komanso kufufuza zinthu zamtunduwu pamapulaneti ena."
Mapangidwe a zokwiriridwa zakalezi, malinga ndi mnzake wa pulofesa, akuwonetsa kuthekera kwa moyo wachilendo ndipo atha kugwiritsidwa ntchito ngati khomo lophunzirira za zakuthambo.
"Ndikunyamula zinthu zamtengo wapatali," Iye anati. "Izi ndi zotsalira zakale kwambiri. Chotero m’njira ina, nkodzichepetsa kwambiri chifukwa chakuti ine ndine munthu woyamba, nyama yoyamba, chamoyo choyamba pa dziko lapansi, kuona zinthu zimenezi ndi kuzindikira chimene ziri.”
Izi zisanachitike, malinga ndi Business Insider, miyala yakale kwambiri mpaka pano inali mafupa a 3.5 biliyoni opezeka kumadzulo kwa Australia.
