Dziko lapansi ndi lokhalo lomwe tikutsimikiza kuti lingathandizire mitundu yaukadaulo, koma sizinaperekedwe chidwi kuti mwina, zaka zopitilira 4.5 biliyoni, dziko lathu lapanga chitukuko chopitilira chimodzi.
Katswiri wa zanyengo Gavin Schmidt, director of the NASA's Goddard Institute for Space Study, pamodzi ndi Adam Frank, wasayansi ku University of Rochester, adaganiza zofufuza malingalirowa ndipo adalemba limodzi nkhani wotchedwa "Lingaliro la Silurian: kodi zingatheke kupeza chitukuko cha mafakitale mu mbiri yakale?"
Mawu oti "Silurian" adatengedwa kuchokera ku Britain zopeka za "Doctor ndani", zomwe zikutanthauza mtundu wa reptilian womwe udakhala Padziko Lapansi zaka mamiliyoni ambiri dziko lathu lisanayambike.
Lofalitsidwa mu International Journal of Astrobiology, pepalali limalongosola mtundu wa siginecha yomwe mtundu waluso waukadaulo umatha kusiya. Schmidt ndi Frank amagwiritsa ntchito zomwe anena za Anthropocene, nyengo yomwe zochitika za anthu zikuwongolera zochitika zapadziko lapansi, monga nyengo ndi zachilengedwe, monga chitsogozo cha zomwe tingayembekezere kuchokera kuzinthu zina.
Ndikoyenera kukumbukira kuti nyumba zazikulu zowulula zilizonse sizingakhalebe zotetezedwa kwa zaka makumi mamiliyoni a zochitika zachilengedwe, izi zikugwira ntchito pachitukuko cha anthu komanso kwa otsogola ena onse a "Silurian" Padziko Lapansi.
M'malo mwake, a Schmidt ndi a Frank akufuna kuti pakhale zisonyezo zobisika kwambiri, monga zopangidwa ndi mafuta, zotsalira, kutayika kwa pulasitiki, zinthu zopangira, kusokonekera kwa chitukuko chaulimi kapena kudula mitengo mwachisawawa komanso isotopu zowononga ma radio zomwe zingayambitsidwe ndi zida za nyukiliya. .
"Uyeneradi kulowerera m'malo osiyanasiyana ndikusonkhanitsa zomwe ukuwona," anatero Schmidt. “Zimakhudza umagwirira, matope, nthaka ndi zinthu zina zonsezi. Ndizosangalatsa kwambiri ", adatero.
Mgwirizano wa Drake
Nkhani ya asayansi imalumikiza lingaliro la Silurian ndi Mgwirizano wa Drake.
Chimodzi mwazosintha zazikulu mu equation ndi nthawi yomwe zitukuko zimatha kutumiza zikwangwani zowoneka. Chifukwa chomwe sichikutha kulumikizana ndi nyama zakunja ndikuti nthawi ino kusiyanasiyana kumatha kukhala kochepa kwambiri, mwina chifukwa chitukuko chaukadaulo chodziwononga chokha kapena chifukwa choti amaphunzira kukhala moyo wabwino kudziko lakwawo.
Malinga ndi a Schmidt, ndizotheka kuti nthawi yodziwika bwino yachitukuko ndiyofupikitsa kuposa kutalika kwake, chifukwa ife, umunthu, sitingakhale nthawi yayitali pochita zinthu zomwe tikuchita. Timayimitsa chifukwa tidagwedeza kapena sitiphunzira.
Komabe, kuphulika kwa zochitika, zinyalala ndi kuchuluka kwamayendedwe ambiri, kwenikweni, ndi nthawi yayifupi kwambiri. Mwinanso zidachitika nthawi biliyoni m'chilengedwe chonse, koma zikadakhala zaka 200 nthawi iliyonse, sitikadawonanso.
Silurian Hypothesis
Mfundo yomweyi imagwiranso ntchito pazitukuko zilizonse zomwe zitha kuchitika Padziko Lapansi, kuti zigwere m'mabwinja kapena kuchepetsa zinthu zomwe zimawopseza moyo wake wothandiza. Pali maphunziro ena osabisika omwe anthu atenge kuchokera munjira yopingasa yomwe, pambuyo pake, ndi mafakitale a mantra wakale wosinthika: kusintha kapena kufa.
Izi, za Schmidt ndi Frank, ndiimodzi mwamitu yayikulu yamalingaliro a Silurian. Ngati tingathe kulingalira za kuthekera kuti sitife a Terran oyamba kupanga chitukuko chaukadaulo, mwina titha kuzindikira bwino zovuta zomwe tili nazo
"Lingaliro lonena za malo athu m'chilengedwe chonse lakhala lakutali kopitilira patali ndi kafukufukuyu," adatero Schmidt, ponena za zikhulupiriro zachikale, monga mtundu wa chilengedwe cha chilengedwe. "Zimakhala ngati kusiya pang'ono ndi pang'ono malingaliro odzikonda, ndipo lingaliro la Silurian ndi njira ina yochitira izi."
"Tiyenera kukhala achidwi komanso otseguka ku mitundu yonse ya zotheka, ngati titha kuwona zomwe chilengedwe chimatipatsa," Schmidt anamaliza.
