No35
A possibility that the alien affected the earth
There is almost no possibility of having generated the life phenomenon
independently on the earth.
We cannot expect a possibility that the microbe was sent here with the
meteoriter.
Only a possibility "the life was brought artificially" is considered.
"An alien's colonization star is near the earth.
It explodes by some reasons.
The part comes flying to the earth.
The life which remained in the meteorite increased under the environment
of the earth by chance."
In this case, it may give a broad interpretation and we may think that
it is such.
To consider like this rather than it is more rational.
"The life was born as a result of an alien's having a certain influence
on the earth."
We may adhere to the idea "the life was born on the earth."
If an accidental occurrence which a miracle calls a miracle continues,
we will think that the phenomenon may happen.
We assume it to be 4 billion years before that the life phenomenon occurred
to the earth.
In order to make an earth life, there is no necessity that an alien visits
the direct earth.
4 billion years ago, if the space civilization to which civilization-ization
progressed rather than the present human beings for 10 million years or
more exists, it will be possible to affect the earth inevitably.
Of course, there is no proof which the influence of an alien exerted on
the earth.
It is difficult for us to look for the trace of old organisms on the present
earth for 600 million years or more.
After the organism occurred, they were detailed monadics for about 3 billion
years.
Those days, the alien made what the earth,
There are no means which we know.
"We have not discovered such relics from the stratum of 4 billion
years ago.
It is the lie which is referred to as that the alien affected the earth."
Thus, please do not consider in short circuit.
If it considers whether the trace of the present civilization remains until
after 4 billion years, we can understand that.
Practically, not to mention 4 billion years, even the ruins of 400 years
ago hardly remain.