The discovery of extraterrestrial life could be the death knell for atheism, at least for the thinking atheist. On the other hand, it should not be at all surprising for someone holding the Christian world view that God is the creator of life in the universe.
Cold, hard logic dictates that the cause of nature cannot be natural if we are to avoid the circular fallacy. Logic dictates, therefore, that the cause of nature must be not-natural (i.e., supernatural)
One of the unintended consequences of Darwinism is that nature became our creator. Couple this with the beauty and awe we often experience in nature and the ancient religion of Pantheism has awakened once again in the 21st century.
If it is an illegitimate move to a priori rule out the occurrences of miracles in this world, we are left with the task of identifying them. Two criteria are helpful in distinguishing a miracle from a natural anomaly.
Many people never think of applying their critical thinking skills when it comes to scientific claims. Unfortunately, 21st century science has become a mix of good science, bad science, creative story-telling, science fiction, scientism (atheism dressed up as science), citation-bias, huge media announcements followed by quiet retractions, massaging the data, exaggeration for funding purposes, and outright fraud. It is therefore important to distinguish between good science and rubbish dressed up as science.