Asteroid Ryugu might contain a building block of RNA

How did uracil get there??

Two pots of black looking soil. The one on the left (called A0106) is significantly chunkier than the right (C0107).
Photographs of samples A0106 and C0107 collected from the asteroid Ryugu, during the 1st touchdown sampling and 2nd touchdown sampling, respectively. Credit: Yasuhiro Oba et al, Nature Communications, March 21, 2023