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The references aren't to the biological literature.Ĭlick to expand.It's not ridiculous to assume it will be very different. New theory proposed by whom? The stories say "scientists" but those scientists aren't identified. Even if the first prokaryotic cells arrived on Earth from somewhere else through some kind of panspermia, I'm convinced that once here, Earth life all shares the same evolutionary history. And given all the similarities that human beings share with each other and with the rest of Earth life, especially down there on the cellular level, tells me that all of us have the same initial origins. The whole idea of space aliens with different biological origins even being reproductively compatible with Earth humans is kind of ridiculous as far as I'm concerned. Why do our fertilized eggs develop the same way, in the same order, into complete organisms? Why is there so much similarity between fetal development of all humans and other multicellular eukaryotes? (Neural folds, gill slits and so on.) Why do we share the same kind of ribosomes that other eukaryotes have? (Bacteria and archaea have different ones, as do mitochondria and chloroplasts.) Wouldn't space aliens have really different ones, assuming they had ribosomes at all? Why is our cell metabolism the same? Microorganisms (and photosynthetic plants) show us that a plethora of possible pathways exist, so why do humans all use the same aerobic and anaerobic respiration where anaerobic glycolysis and Kreb's cycle cranks out ATPs? So why is there so much similarity in cell membrane molecular biology, apart from a slight difference in this one protein, if some of us have alien origins? My layman's understanding of the RH system is that RH antigens seem to be proteins associated with cell membranes, with ion channels in particular. Why are they eukaryotes with cell membranes, nuclei, chromosomes, mitochondria and all the rest? Why are their chromosomes so similar, with all the histone proteins, centromeres and telomeres? There may be other functionally similar possibilities we don't see here on Earth and haven't even imagined. Why would DNA be the information storage medium in the first place? RNA viruses show that RNA works, and current speculations are that RNA may have been the original genetic material.
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If RH negative people's DNA isn't from Earth, why are they so similar to other humans? Wouldn't a separate evolutionary origin have resulted in there being countless differences? The references aren't to the biological literature. Click to expand.New theory proposed by whom? The stories say "scientists" but those scientists aren't identified.