Many theories are used in the origin of life; Panspermia is one of them, and there are two types of panspermia, the most accepted because there is a lot of evidence that supports this type of panspermia and it is that of the elements, the Earth did not have all the elements or in the area where the Earth was emerging there were not all the elements necessary for life to develop, there are certain elements, certain substances, certain molecules that need cold areas to form, while the Earth was in a hot area.
There may not even have been water on Earth, as shown by a recent discovery of an exoplanet that was from a baby, newborn esoplanetary system. warm zone, in the warm zone there was no water, it was not possible to exist because the ice sublimated, transformed into vapor and then the wind from the star pushed that vapor, that water vapor gas out to the outer zone, where there was ice in abundance around that star.
On Earth something could have arisen, something similar could have happened, it was in the warm zone, there could not be water, nor other molecules related to the origin of life because they needed that cold, but that water and those molecules were there and were formed in the outer zones of the solar system in birth and they arrived aboard comets, bombarded by comets, there were great bombardments of comets in the past.
That would be one of the theories of soft panspermia and strong panspermia, it would say that living beings themselves, microorganisms formed in other places, because they also came to Earth aboard comets, basically, this does not explain the origin of life, it simply moves it to another place, but it is also true that at the origin of the solar system there must have been many, many protoplanets, that is, small planets in birth that were very similar to Saturn's moon Enceladus or the moon Europa, worlds with a crust frozen, but underneath an ocean heated by the internal heat of that planet in formation.
And in that environment the vine could have prospered and emerged, one of those worlds that would have been destroyed, for example, by the collision with others, because at that time there were hundreds of protoplanets roaming the solar system, it could have perfectly launched enormous blocks of ice that would form comets within which some bacteria could have survived and those bacteria in the form of a “stowaway” could have reached Earth.
It would have to be in intermediate size kites, because a large kite,
a comet of more than 50 km or large comets of more than 20 km, I see it as doubtful because the impact would generate such heat that it would kill any living being that had emerged, that was inside that ice, that comet, they would have to be small comets that broke up and somehow could fall whole or in quite entire blocks on the primitive oceans of the Earth, that would be the theory of paspermia with the origin of life outside the Earth.
But once all that has arisen, how do you get to the point where those microorganisms decide to unite and create complex life, that is one of the great questions of the evolution of life.
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