Earlier quoted context omitted.
To be fair, there are entire human civilizations we know have existed that we barely have archeological evidence to make sense of. We know they had language, culture, technology and we've found shells, bones and rubble. That, and the fact that we've found one antiktythera mechanism and nothing like it before or since raises questions. It seems implausible for a culture to produce a singular advanced mechanical comput…
To the contrary: the fact that only one ever was found, to me, suggests that it was the work of one brilliant mind whose work was not understood or continued by their culture.
Could an industrial civilization have predated humans on Earth?
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Re: Could an industrial civilization have predated humans on Earth?
#72Evidence for a Large Anomalous Nuclear Explosions in Mars Past J.E. Brandenburg https://www.hou.usra.edu/meetings/lpsc2015/eposter/2660.pdf
That was interesting until the last slide which had pictures of "objects" imaged on mars. At least one of those images has been debunked (random elevations creating coincidentally-interesting shadows). If that slide was a joke, they should have made it obvious for those looking at the slides without context of a presentation.
John E.Brandenburg
https://www.tsijournals.com/abstract/evidence-of-massive-the...
Re: Could an industrial civilization have predated humans on Earth?
#73Earlier quoted context omitted.
Which happened for all fossils already and they are still there.
Fair point, although not all of them, and not all of those that do remain. If styrofoam ever starts rotting, maybe the styro-philes will eat 100% of each cup and poop out only completely normal organic matter. Nobody will ever find it!
Re: Could an industrial civilization have predated humans on Earth?
#74If there were an industrial civilization here before us (modern humans) then it would be astonishing that in all of the fossils we have discovered, we've never yet discovered a single ancient nut, bolt, screwdriver, wrench, etc. Not one single wire or cast metal part. As per the article, that civilization would have to predate all of the vast history of evolution that we know of. Wouldn't some higher life forms from…
Re: Could an industrial civilization have predated humans on Earth?
#75Plates shift and subduct. Huge sections of land suddenly (geologically speaking) find themselves under the ocean. Just read about "Doggerland", or "Beringia", and you realize that the history we have is only the history of things that remain on the surface of the earth.
Re: Could an industrial civilization have predated humans on Earth?
#76Earlier quoted context omitted.
That’s a good point, and I don’t have an answer. In my mind I was thinking of more obvious examples, like camels being introduced to Australia. Or cichlids from Lake Victoria being introduced into isolated lakes in North America. The idea being that you would notice some very obvious out-of-place fossils. I also assume that these species, often invasive, would outlast the civilizations that introduced them. So you co…
We would naturally just assume that the same species appearing in different places just implied that those places were closer together in the past + migration. And so we have Pangaea before continental drift. If we lacked progenitors of those species in some places, we would just call it a temporary gap in the fossil record, of which we have many. We're pretty good at inventing explanations. Eventually these gaps mig…
Re: Could an industrial civilization have predated humans on Earth?
#77Earlier quoted context omitted.
Not pre-human but challenging the understood modern human timeline of industrialisation — We have not found the tools, but we may have found the products; in the form of stone-based vases that archeologists attribute to the Early Egyptian Period but are believed to be from much earlier, and would have required tools that have not been discovered yet. The channel UnchartedX make a compelling argument about this hypoth…
You were assuming that their industrial civilization would look anything like ours. Why do they need nuts and bolts? Why couldn’t they have use some natural form of biodegradable materials?
Casting iron(copper) is relativly easy and powerful.
Experiment with hot things in fire and you will discover it after a while.
"Why couldn’t they have use some natural form of biodegradable materials?"
Like bones for bows and spears? Humans did that, but metal is apparently more effective and useful.
Re: Could an industrial civilization have predated humans on Earth?
#78A civilization that got to "industrial" but didn't make it to the nuclear and particularly space age certainly seems like it could leave little trace over long periods depending on how the cards fell. However, if nothing else our civilization has made a habit of disposing of geosync satellites past their life time into super synchronous graveyard orbits that will last a really long time. At the rate things are going…
If we weren't already tracking those decommissioned satellites, would we know they were there?
Re: Could an industrial civilization have predated humans on Earth?
#79If there were an industrial civilization here before us (modern humans) then it would be astonishing that in all of the fossils we have discovered, we've never yet discovered a single ancient nut, bolt, screwdriver, wrench, etc. Not one single wire or cast metal part. As per the article, that civilization would have to predate all of the vast history of evolution that we know of. Wouldn't some higher life forms from…
This assumes that their technology would be similar to ours. They could have used biological mechanical parts, made from plant or animal material. They could have had radically different theories of mechanics or construction that better fit the state of the planet at their time. In general the statement "They couldn't have been civilized because they aren't exactly like us" limits what we look for and how we look for…
So, a very wide range of "industrial civilizations" would be expected to leave behind lots of basic natural materials in artificial forms. Their basic natural materials would be about the same as ours because they are found in nature and not very diverse (compared to high tech pharma chemicals or digital algos), so we ought to be finding lots of evidence of pre-human low(ish) tech, even if they were quite high tech.
Re: Could an industrial civilization have predated humans on Earth?
#80If there were an industrial civilization here before us (modern humans) then it would be astonishing that in all of the fossils we have discovered, we've never yet discovered a single ancient nut, bolt, screwdriver, wrench, etc. Not one single wire or cast metal part. As per the article, that civilization would have to predate all of the vast history of evolution that we know of. Wouldn't some higher life forms from…
If it were more than 65 million years ago there would be no evidence due to plate tectonics destroying all evidence. Still could be on the moon or another planet though.