Even a former astronaut can confuse scientism with science. Scientism is essentially atheism dressed up in a lab coat. The result is an unquestioning faith in the belief that science can explain everything, including the origin of love, beauty, and even nature itself.
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)