What is the writing background of The Mystery of Cosmic Life?

There are no signs of life on other planets in the universe except life on the earth. Although human beings have not found life outside the earth so far, they still firmly believe that there is life.

This article introduces the difficult course of scientists exploring whether there is life outside the earth, and shows that up to now, whether there is life outside the earth is still an unsolved mystery. It expresses the author's admiration for scientists' spirit of pursuing true knowledge and exploring constantly, and at the same time stimulates students' interest in loving science, learning science and exploring the mysteries of the universe.

The full text of The Mystery of Cosmic Life is narrated in the order of "asking questions-analyzing problems-drawing conclusions". This is also the common writing order of expository texts.

This paper is a popular science article, which introduces the difficult course of scientists exploring whether there is life outside the earth, and finally shows that whether there is life outside the earth is still an unsolved mystery so far.

Describe in the order of "asking questions-analyzing problems-drawing conclusions".

The author first puts forward that it is a mystery whether there is life in space other than the earth, and then analyzes four conditions for the existence of life, and analyzes the planets in the solar system other than the earth one by one, and draws the conclusion that it is impossible or difficult for life to exist on these planets, but it is necessary to continue to explore the "mystery" of cosmic life.