"Rare Earth: Why Complex Life Is Extremely Rare in the Universe" is a science book written by Australian scientists Peter Wordsworth and Donald Brownlee. In this book, the authors investigate the possibility of the existence of complex life in other parts of the universe. They analyze the various physical, chemical, and geological factors that influence the origin and development of life in the universe, and draw conclusions about why complex life may actually be rare. Informative and fascinating, the book "Rare Earth" helps to understand the complex processes that underlie the existence of life in the universe.