[quote=“citizenschallengev4, post:17, topic:10034”]
Are you saying there’s nothing special about impact and aftermath of Theia impact, (or double impact)?
Not really , considering the number of planets in the dynamic universe where everything is in motion. Just think of the impact of super novae have on their surrounding galaxies
But the biggest bugaboo is in the question we’re asking: “Is there Life on the Planets?”
Because that is incorrectly phrased.
The question should be; “Is life on other planets possible?” And the answer to that is, “Yes”
If life is possible, then it becomes a matter of probability, and in view of the incalculable number of chemical reactions that have occurred in the 14 billion years of the existence of this dynamic universe, it becomes merely a matter of time and spatial substrates before self-replicating polymers form and life evolves thereafter.
Because on this planet Life has learned to occur on so many levels,
The Life of microscopic prokaryote single cells;
The Life of microscopic eukaryotes single cells;
The Life of complex organization of multiple eukaryotes single cells;
The Life of bilateral bodies;
The Life of organisms that could survive on land;
Those are all results of evolution and adaptation to the environment.
And that proves that life is not rare at all. It proves life is extremely adaptive to many environments. There is complex life at the poles, in the deserts, in the deepest parts of the oceans, in boiling sulphur pits. There is more or less complex life everywhere!
Simple life such as extremophiles can be found in otherwise deadly environments to all other life.
The Life of remembering, introspective creatures;
I would agree with the way that question is phrased. But there needs to be no introspection for memory to be present.
Microtubules have memory. And microtubules are extremely simple self-organizing polymers.
Have a look at carbon bucky balls. One of the most occurring self-organizing elements in the universe.
The Life of human like beings;
The Life of hunter gather, eventual agrarian herder civilizations;
The Life of dominating nature, taking on the "power of the gods;
I agree that such complexity may be very rare in the universe.
The Life of today’s moderns projecting themselves out into our galaxy?
Humans have not projected themselves into our galaxy yet. We have sent rockets but we have not yet personally ventured beyond our own solar system yet.
For vast stretches of our planet’s existence no life is possible beyond the simplest of cells and such.
I disagree with that. I submit the reverse is true. Have a look at “Tardigrades”
Milnesium tardigradum , a eutardigrade
and
Echiniscus insularis , a heterotardigrade
They have been found in diverse regions of Earth’s biosphere – mountaintops, the deep sea, tropical rainforests, and the Antarctic.[8] Tardigrades are among the most resilient animals known,[9][10] with individual species able to survive extreme conditions – such as exposure to extreme temperatures, extreme pressures (both high and low), air deprivation, radiation, dehydration, and starvation – that would quickly kill most other known forms of life.[11] Tardigrades have survived exposure to outer space.[12][13]
There are about 1,300 known species[14] in the phylum Tardigrada, a part of the superphylum Ecdysozoa consisting of animals that grow by ecdysis such as arthropods and nematodes. The earliest known true members of the group are known from Cretaceous (145 to 66 million years ago) amber, found in North America, but are essentially modern forms, and therefore likely have a significantly earlier origin, as they diverged from their closest relatives in the Cambrian, over 500 million years ago.
Tardigrade - Wikipedia
It is precisely these specialized species that prove the probability of life on other planets. Hazen is convinced that there is life on other planets throughout the universe.
It may even be possible that polymers can form in interstellar clouds.
An interstellar cloud is generally an accumulation of gas, plasma, and dust in our and other galaxies. Put differently, an interstellar cloud is a denser-than-average region of the interstellar medium, the matter and radiation that exists in the space between the star systems in a galaxy.
Depending on the density, size, and temperature of a given cloud, its hydrogen can be neutral, making an H I region; ionized, or plasma making it an H II region; or molecular, which are referred to simply as molecular clouds, or sometime dense clouds. Neutral and ionized clouds are sometimes also called diffuse clouds. An interstellar cloud is formed by the gas and dust particles from a red giant in its later life.
Interstellar cloud - Wikipedia