Some good educational sites for reference.  COURSERA WHAT Coursera strives to make education accessible to anyone. HOW Free courses online from world-class universities, including Princeton University and the University of Michigan. The topics are varied, and lectures are formatted…
I do not think this is sound Logic.
There is a probability that Life might have evolved through some other process of which we know nothing.
The building block of Life may be different from what is found on Earth.
Taking these facts into consideration I feel that we are not alone and that right now we lack the technology and skills to track it.
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