On the other hand, other scientists are pessimistic. Jacques Monod wrote that "Man knows at last that he is alone in the indifferent immensity of the universe, whence which he has emerged by chance". In 2000, geologist and paleontologist Peter Ward and astrobiologist Donald Brownlee published a book entitled Rare Earth: Why Complex Life is Uncommon in the Universe. In it, they discussed the Rare Earth hypothesis, in which they claim that Earth-like life is rare in the universe, whereas microbial life is common. Ward and Brownlee are open to the idea of evolution on other planets that is not based on essential Earth-like characteristics such as DNA and carbon.
on the other hand other scientists are pessimistic jacques monod wrote that "man knows at last that he is alone in the indifferent immensity of the universe whence which he has emerged by chance" in 2000 geologist and paleontologist peter ward and astrobiologist donald brownlee published a book entitled rare earth why complex life is uncommon in the universe in it they discussed the rare earth hypothesis in which they claim that earth-like life is rare in the universe whereas microbial life is common ward and brownlee are open to the idea of evolution on other planets that is not based on essential earth-like characteristics such as dna and carbon