Ososayensi bathole ukuthi ama- meteorite amathathu aqukethe izakhi zokwakha amakhemikhali e-DNA nomngane wayo i-RNA. Ingxenye encane yalezi zingxenye zokwakha itholakale ngaphambilini kuma-meteorite, kodwa ingxenye esele yeqoqo ibingekho ngokumangalisayo emadwaleni asemkhathini - kuze kube manje.
Ngokusho kwabacwaningi, ukutholakala okusha kusekela umqondo wokuthi eminyakeni eyizigidi eziyizinkulungwane ezine edlule, ukuqhuma kwamabhomu kwama-meteorite kungase kunikeze izakhi zamakhemikhali ezidingekayo ukuze kuqalwe ukwakheka kwempilo yokuqala emhlabeni.
Nokho, akubona bonke abakholelwa ukuthi zonke izingxenye ze-DNA ezisanda kutholwa zinemvelaphi engaphandle komhlaba; kunalokho, kungenzeka ukuthi abanye bagcina bengama-meteorite ngemva kokuba amadwala efika eMhlabeni, ngokusho kukaMichael Callahan, isazi samakhemikhali esihlaziyayo, isazi sezinkanyezi, kanye noprofesa ohlangene eBoise State University owayengahileleki ocwaningweni. "Kudingeka izifundo ezengeziwe" ukuze kugwenywe lokhu, kusho uCallahan Isayensi Ebukhoma ku-imeyili.
Uma sicabanga ukuthi zonke izinhlanganisela zavela emkhathini, isethi encane yezakhiwo zokwakha isigaba sezinhlanganisela ezaziwa ngokuthi - i-pyrimidines ivele "ekugxilweni okuphansi kakhulu" kuma-meteorites, wanezela. Lokhu okutholakele kusikisela ukuthi ama-molecule okuqala ofuzo emhlabeni awavelanga ngenxa yokutheleka kwezingxenye ze-DNA ezivela emkhathini kodwa ngenxa yezinqubo ze-geochemical ezembuleka ekuqaleni koMhlaba, wengeza.
Okwamanje, nokho, "kunzima ukusho" ukuthi yikuphi ukuhlangana kwamabhlokhi e-DNA okwakha ama-meteorite obekungadingeka ukuqukatha ukusiza ekuqhamukeni kwempilo eMhlabeni, ngokusho kukaJim Cleaves, isazi sokuma komhlaba nomongameli we-International Society for the Study of the Origin of Life owayengabandakanyekanga ocwaningweni. Lolu daba lusabhekwa.
