Using state-of-the-art analytical techniques, researchers have detected diverse suites of nucleobases — including canonical base pairs (e.g., adenine-uracil, guanine-cytosine, adenine-thymine) and some non-canonical ones (e.g., isoguanine-isocytosine and xanthine-2,4-diaminopyrimidine) — in three carbonaceous meteorites: the Murchison, Murray, and Tagish Lake meteorites. Conceptual image of meteoroids delivering nucleobases to ancient...
