Study Finds All Five DNA and RNA Building Blocks on Asteroid Ryugu

A study published on March 16 in Nature Astronomy reveals that the asteroid Ryugu contains all five molecular bases essential for DNA and RNA, supporting theories that life's ingredients may have arrived on Earth via asteroids. Researchers, including co-authors Yasuhiro Oba and Toshiki Koga, analyzed samples collected by Japan's Hayabusa 2 mission, which returned material to Earth in 2020. The findings indicate these nucleobases are widespread in the solar system, with their composition linked to ammonia levels, suggesting unknown chemical pathways in early solar system formation. This research highlights asteroids as preservers of ancient materials, offering insights into the origins of life.