Rangarira ndima iri pasi apa uye ipapo pindura mubvunzo gare gare mumutauro mumwe chetewo sechikamu:  Passage: Mienzaniso yokufungidzira yokuvandudzika kweZuva inoratidza kuti makore 3.8 kusvika ku 2.5 mabhiriyoni akapfuura, mukati meArchean eon, Zuva rakanga richingova rinenge 75% rinopenya sezvazviri nhasi. Nyeredzi isina simba yakadaro ingadai isina kukwanisa kutsigira mvura iri mumvura pamusoro pePasi, uye nokudaro upenyu hungadai husina kukwanisa kukura. Zvisinei, chinyorwa chezvokuchera pasi chinoratidza kuti pasi rakagara riri patembiricha inogara iripo munhau yaro yose, uye kuti pasi duku rakanga rakapisa zvishoma kupfuura zvariri nhasi. Imwe rondedzero iri pakati pevasayendisiti ndeyokuti mumhepo yakapoteredza Nyika yechiduku maiva nemvura yakawanda inokonzera kupisa (yakadai sekabhoni dhayokisaidhi, methane) kupfuura iripo nhasi, iyo yakabata kupisa kwakakwana kuti ibatsire kuderedza huwandu hwesimba rezuva rinosvika kwariri. Zvisinei, kuongororwa kweArchaean sediments kunoratidzika kusingawirirani nefungidziro yezvipimo zvepamusoro zve greenhouse. Panzvimbo pezvo, kupisa kwakadzikama kungatsanangurwa nealbedo yepasi yakaderera yakaunzwa nenzvimbo duku yenyika uye "kushayikwa kwenyeredzi dzegore dzakasanganiswa noupenyu". Izvi zvaizoita kuti simba rezuva riwedzere kutorwa, nokudaro zvichibhadhara kuderera kwezuva.  Mubvunzo: Munguva yakareba zvakadini kare zuva raipenya nechiedza chine zvikamu makumi manomwe nezvishanu kubva muzana sezvazvinoita nhasi?
Makore 3.8 kusvika ku2.5 bhiriyoni apfuura