The chemical "letters" used to write the basic code for life on Earth might exist on Saturn's largest moon, according to new research presented Thursday. The findings suggest the building blocks of life on Earth may have originated in the air, not only in primordial "soup" on land. Based on lab experiments, scientists concluded it's possible the thick atmospheric haze on Titan contains the five so-called nucleotide bases used in DNA and RNA, as well as some simple amino acids. (source: news.nationalgeographic.com)
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