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Ryugu asteroid sample contains all five key components of DNA, scientists find  SpaceA complete set of canonical nucleobases in the carbonaceous asteroid (162173) Ryugu  NatureAsteroids and meteorites may have delivered the building blocks for life on Earth  Courthouse News ServiceAsteroid Reveals The 5 Key Genetic Ingredients For Life on Earth  ScienceAlertRyugu asteroid samples contain all DNA and RNA building blocks, bolstering origin-of-life theories  Phys.org