Also: Hayabusa2, Ryugu
Japan's Hayabusa2 brought back about 5 g of pristine material from asteroid Ryugu in 2020, untouched by Earth's air and life.
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Oba and colleagues detected uracil, one of the four RNA bases, plus niacin (vitamin B3) in water extracts of Ryugu samples.
As reported in: Oba, Koga, Takano et al. (2023). Uracil in the carbonaceous asteroid (162173) Ryugu. Nature Communications. doi:10.1038/s41467-023-36904-3
Yada and colleagues described the returned Ryugu particles, millimetre-size and smaller, preserved as they were on the asteroid.
As reported in: Yada, Abe, Okada et al. (2021). Preliminary analysis of the Hayabusa2 samples returned from C-type asteroid Ryugu. Nature Astronomy. doi:10.1038/s41550-021-01550-6