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ExNihilo wrote: ↑09/02/2021 16:25
Možda jeste nasumičan, ali moja poenta je da ako imamo evo, ovdje, na Zemlji, planetu koja ima sve preduslove za nasumičan nastanak života, ali se to ipak ne dešava zadnjih 3.5 milijarde godina,

In addition, the site to meet all nine requirements is in very rare circumstances even on Hadean earth. Probably both geysers and uranium ores are ubiquitous in Hadean as we stated in earlier section. However, it is not easy to clear listed conditions one by one. Even if geyser could be combined with uranium ore as a natural reactor, it will be another difficult condition to have necessary Hadean rocks within a nuclear geyser to form necessary BBLs. Also, it could be difficult to have an ideal underground space to promote prebiotic chemical reactions with suitable material circulation. These collateral environmental conditions make the birthplace more complicated. Considering these difficulties, the places that meets all the nine requirements cannot be many. It might be only one site on the Earth.

In Hadean time, the surface environment was more reducing. Through the evolution of the Earth, environment has gotten oxidized, and since 600 Ma, reducing environment has almost lost even in ocean because about 10% of atmospheric oxygen is dissolved into sea water and circulate down to the bottom of the ocean. Therefore, pleasant environment for primitive life do not exist anymore excluding an exception of hydrothermal vents along oceanic transform faults where serpentinization produces H2 to keep extremely local reducing environment with moderate temperature, like Lost City.

statixx wrote: ↑12/02/2021 12:52

ExNihilo wrote: ↑09/02/2021 16:25
Možda jeste nasumičan, ali moja poenta je da ako imamo evo, ovdje, na Zemlji, planetu koja ima sve preduslove za nasumičan nastanak života, ali se to ipak ne dešava zadnjih 3.5 milijarde godina,

Imala je, nema vise.

Evo nešto svježe, alternativa hipotezama o primordijalnoj supi i hidrotermalnim izvorima.

In addition, the site to meet all nine requirements is in very rare circumstances even on Hadean earth. Probably both geysers and uranium ores are ubiquitous in Hadean as we stated in earlier section. However, it is not easy to clear listed conditions one by one. Even if geyser could be combined with uranium ore as a natural reactor, it will be another difficult condition to have necessary Hadean rocks within a nuclear geyser to form necessary BBLs. Also, it could be difficult to have an ideal underground space to promote prebiotic chemical reactions with suitable material circulation. These collateral environmental conditions make the birthplace more complicated. Considering these difficulties, the places that meets all the nine requirements cannot be many. It might be only one site on the Earth.

In Hadean time, the surface environment was more reducing. Through the evolution of the Earth, environment has gotten oxidized, and since 600 Ma, reducing environment has almost lost even in ocean because about 10% of atmospheric oxygen is dissolved into sea water and circulate down to the bottom of the ocean. Therefore, pleasant environment for primitive life do not exist anymore excluding an exception of hydrothermal vents along oceanic transform faults where serpentinization produces H2 to keep extremely local reducing environment with moderate temperature, like Lost City.

https://www.sciencedirect.com/science/a ... 7118302123

ExNihilo wrote: ↑12/02/2021 13:04
Ne znam šta bih ti rekao, meni se čini da, ako ne znamo kako je život nastao, a ne znamo, tada ne možemo konkluzivno reći da li još uvijek postoje uvjeti za nastanak života na Zemlji, jer ne znamo koji su to uvjeti, osim na nivou pretpostavke.

Ako je tačna hipoteza da ima nešto specifično u primordijalnoj supi što je pogodovalo nastaku života, onda je također tačno da je život mogao nastati jedino u iznimno uskom rasponu vremena i na drugim svjetovima, što opet život čini manje vjerovatnim fenomenom nego se to obično ističe.

statixx wrote: ↑12/02/2021 13:21

ExNihilo wrote: ↑12/02/2021 13:04
Ne znam šta bih ti rekao, meni se čini da, ako ne znamo kako je život nastao, a ne znamo, tada ne možemo konkluzivno reći da li još uvijek postoje uvjeti za nastanak života na Zemlji, jer ne znamo koji su to uvjeti, osim na nivou pretpostavke.

Ako je tačna hipoteza da ima nešto specifično u primordijalnoj supi što je pogodovalo nastaku života, onda je također tačno da je život mogao nastati jedino u iznimno uskom rasponu vremena i na drugim svjetovima, što opet život čini manje vjerovatnim fenomenom nego se to obično ističe.

Naravno, zivot je prema svemu sudeci izuzetno rijetka pojava.

A sto se tice preduslova za zivot, tacno je da ne znamo, ali kontekst je bila konstatacija da "planeta ima sve preduslove za nasumican nastanak zivota, ali se to nije desilo posljednjih 3,5 mlrd godina".

saint_mirad wrote: ↑12/02/2021 14:45 'Primordijalna supa' je podjednako nedokazan i nasumican termin za objasnjavanje porekla zivota kao i ExNihilo stvaranje ili kad neko random istocnjacko bozanstvo stvori zivot masturibanjem.

Ne kontam kako ljudi ove naucne verzije mitova uzimaju tek tako zdravo za gotovo.

MarlboroGold wrote: ↑12/02/2021 07:57

dale cooper wrote: ↑12/02/2021 00:02

MarlboroGold wrote: ↑09/02/2021 19:07 Ovo mi sve miriše na one silne tekstove o Annunakijima i ostalima koje sam čitao...

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