Everything needed to make DNA and RNA found on asteroid

"The purines adenine and guanine and the pyrimidines cytosine, uracil and thymine constitute the base sequences of DNA and RNA that encode and transmit genetic information. This implies that the molecular prerequisites for life are not unique to Earth and may emerge as natural products of chemical evolution throughout the Solar System."

"Nucleobases could have been delivered to the early Earth, potentially contributing to the molecular inventory necessary for life. Furthermore, elucidating the formation mechanisms of extraterrestrial nucleobases helps to constrain the universal physicochemical conditions under which they can form abiotically, thus linking astrochemical processes in interstellar and planetary environments to the chemical evolution that preceded the origin of life."

Scientists analyzing samples from asteroid Ryugu discovered all five canonical nucleobases—adenine, guanine, cytosine, thymine, and uracil—that comprise DNA and RNA. These findings, published in Nature Astronomy, indicate that the molecular prerequisites for life are not unique to Earth but emerge as natural products of chemical evolution throughout the Solar System. Similar nucleobases were found in samples from asteroid Bennu and the Orgueil meteorite. The research suggests nucleobases could have been delivered to early Earth, contributing to the molecular inventory necessary for life's origin. Understanding how these nucleobases form extraterrestrially helps constrain the universal physicochemical conditions enabling their abiotic formation, linking astrochemical processes to chemical evolution preceding life's emergence.

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