Without stars forming there is no life..........period. This isn't Star Trek where you can have alternate scenarios with fluidic space and whatnot.
This isn't true at all, life exists in the geothermal vents at the bottom of the ocean and get no light and are entirely self sufficient. Many scientists think life on earth started at those vents. If there is life under the ice sheets of europa then it will be entirely without light. We don't know what sort of universe would exist with different laws of physics and to blanket say that life could never exist unless it was exactly like us and under exactly these conditions is incredibly unimaginative and short sighted.
Life NEEDS certain things to exist and stars forming is just one of them.
Life as we know it needs certain things sure, but not life as we don't know it. We only know one kind of life, and there is no reason to believe there couldn't be others.
DNA forming spontaneously has been rejected by the scientific community and RNA is also losing favor.
As part of that scientific community in my own small way I can certainly tell you that it isn't, the actual base pairs that make up RNA and DNA are actually observable out in the universe, there are giant clouds of the stuff. The basic materials of RNA, DNA, and protein have been found in meteorites and comets. The RNA hypothesis of abiogenesis is not by any means loosing favor except in pop science which always strives to try to make some fascinating article.
The new theory that seems to have popped up is this guy from Harvard.......and no its not the lawyer guy.
That a scientist somewhere has a problem with the RNA world hypothesis is not surprising in the least, there are lots of competing hypothesis. (not theories, we don't have a full theory of abiogenesis yet)
The big problem I see with this theory though is as stated in the article the universe should be swimming in life and we should still be seeing these molecules today.
We do see the base molecules everywhere, giant clouds of them. Our observation technology is unfortunately not that great, we only know the tiniest bit about the tiniest fraction of our galaxy which is only a yet tinier fraction of the universe.
Its not like the process of ambiogenesis would just automatically stop once the first RNA formed, it would continue to go on forever and ever and we would see those molecules to this day.
We see RNA molecules everywhere, because there are living things everywhere, there is no way to differentiate a single RNA molecule you might find from being from a bacteria or to have been spontaneously produced. We don't even have the technology to detect a single molecule of RNA.
But they do not exist in nature
They would be impossible to detect anywhere that already hosted living organisms. We have however managed to get short segments of RNA to assemble themselves in the lab, but without finding another planet on the cusp of developing life and detecting RNA molecules on it, we cannot every have direct evidence that it happens in nature.
That is a huge problem that I still haven't found a decent answer for.
It is almost certainly happening if the theory is true, but we wouldn't be able to detect it with the massively larger quantity of bacterial RNA's that we would also find in any sample. Bacteria are also liable to eat organic molecules that are just floating around.
I asked one scientist and he postulated that maybe they were all eaten up by simple organisms and even he admitted that that was a stretch.
Any that spawn today could easily be eaten by bacteria, its not much of a stretch at all, they would also be impossible to detect because literally everything has life in it. We've found bacteria in hydrochocoholic acid and salt flats, where we origionally thought they couldn't possibly live. Places that would be good for RNA development would also be very good places for bacteria to grow.
My dream is a hemispheric common market, with open trade and open borders.