The assumption that there was a “water problem” at the emergence of life—that the Hadean
Ocean was simply too wet and salty for life to have emerged in it—is here subjected to geological
and experimen Show more
The assumption that there was a “water problem” at the emergence of life—that the Hadean
Ocean was simply too wet and salty for life to have emerged in it—is here subjected to geological
and experimental reality checks. The “warm little pond” that would take the place of the submarine
alkaline vent theory (AVT), as recently extolled in the journal Nature, flies in the face of decades of geological, microbiological and evolutionary research and reasoning. To the present author, the evidence
refuting the warm little pond scheme is overwhelming given the facts that (i) the early Earth was a
water world, (ii) its all-enveloping ocean was never less than 4 km deep, (iii) there were no figurative
“Icelands” or “Hawaiis”, nor even an “Ontong Java” then because (iv) the solidifying magma ocean
beneath was still too mushy to support such salient loadings on the oceanic crust. In place of the
supposed warm little pond, we offer a well-protected mineral mound precipitated at a submarine
alkaline vent as life’s womb: in place of lipid membranes, we suggest peptides; we replace poisonous
cyanide with ammonium and hydrazine; instead of deleterious radiation we have the appropriate
life-giving redox and pH disequilibria; and in place of messy chemistry we offer the potential for life’s
emergence from the simplest of geochemically available molecules and ions focused at a submarine
alkaline vent in the Hadean—specifically within the nano-confined flexible and redox active interlayer
walls of the mixed-valent double layer oxyhydroxide mineral, fougerite/green rust comprising much
of that mound.
Problem”(sic), the Illusory Pond and
Life’s Submarine Emergence—A
Review. Life 2021, 11, 429. https://
doi.org/10.3390/life11050429 Show less