Life's Building Blocks Found in Ryugu Asteroid Samples

All essential ingredients for DNA and RNA have been found in samples from the asteroid Ryugu, according to a new study published in Nature Astronomy.

The Japanese Hayabusa-2 mission collected 5.4 grams of rock from Ryugu in 2020. Analysis revealed all five nucleobases: adenine, guanine, cytosine, thymine, and uracil.

Lead researcher Toshiki Koga emphasized that the findings do not indicate life on Ryugu, but rather show primitive asteroids could generate and preserve key prebiotic molecules.

This discovery aligns with earlier results from NASA’s Bennu mission and meteorite studies, reinforcing the hypothesis that carbonaceous asteroids seeded early Earth with life-supporting chemicals.