When exposed to formaldehyde, which was also detected, ammonia can form amino acids, the building blocks of proteins. According to the study in Nature Astronom y, the team also found 14 of the 20 amino acids present in Earth-bound life in the Bennu sample. In addition, Bennu contains all five of the nucleotide bases present in DNA and RNA.

Japanese scientists detected all five nucleobases — building blocks of DNA and RNA — in samples returned from asteroid Bennu by NASA’s OSIRIS-REx mission. NASA’s OSIRIS-REx mission brought back 121.6 grams of asteroid Bennu,

The study of asteroid samples is a highly lucrative area of research and one of the best ways to determine how the Solar System came to be. Given that asteroids are leftover material from the formation of the Solar System,

Asteroids, small airless bodies within the inner solar system, are theorized to have contributed water and chemical building blocks of life to Earth billions of years ago. Although meteorites on Earth come from asteroids,

Analyzing a sample from an asteroid named Bennu reveals the chemicals necessary to form DNA and RNA.

Rock and dust samples brought back from the near-Earth asteroid Bennu contain organic matter, including amino acids and all five DNA and RNA bases, as well as salts that formed early in the history of Bennu's parent body.

Joint Press Release by Hokkaido University, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Kyushu University, Tohoku University, and

Bennu contains minerals and thousands of organic molecules, including the chemical components that make up DNA.