Subduction Zone
Veteran Member
As to a sign of our fishy heritage I was thinking about the recurrent laryngeal nerve. Its pathway made sense for fish, but when our ancestors left the water and their gills were repurposed the nerve was too vital to be thrown away. so now signals that go to our larynx start in our brain, then go down and loop around our heart and then back up to the larynx. It is even worse for giraffes.Again, human history has been recorded in fairly distinct writing for about 5,000 years. But humans of the homo sapien type have supposedly been around for much, much longer. According to the Smithsonian Institution, about 300,000 years. (That's a long time in comparison to 5,000 years.) Now in the context of things, writing has developed rather quickly supposedly within the past 5,000 years rather than maybe 200,000 years. Do you think that maybe the writing was there but disintegrated before the 5,000 years or so? There was no notice of any species changing recorded by those capable of writing (not gorillas evidently) their history. But I'm pretty sure some reason for that will be given. Like no need -- no records needed of transactions...Insofar as signs of a distant fish ancestor, this does not mean that humans evolved by natural selection from fish. It means that there are certain signals connecting us, including from plants and soil. Like we have skin, fishes have skin. Again -- You may say it means we "evolved" by natural selection from fish. I am saying that is not verification (not proof, of course) that we evolved from some sort of fish, even though we haven't seen fish evolving to anything else except in theory. Of course, for all these years (200,000+?) there has been interest in these things for a couple of thousand years, and in more subjective detail theoretically within the past hundred years or so. Interestingly I find that we do all come from the soil one way or another. No emergence of life could be without soil and water. I won't speak of breath now. Granted that Lucy may not have been too smart, but "homo sapiens" supposedly have been around for -- ?? 200,000 years?
And yes, Homo sapiens have been around for at least 200,000 years. For writing we first needed trade and then eventually cities were formed and most likely for keeping records for trade writing arose. But that is anthropology and I do not really know too much about that.