Researchers say they have found more than ten types of amino acids, the building blocks of proteins, in samples collected from a diamond-shaped asteroid 200 million miles from Earth.

Samples from the asteroid Ryugu contain uracil, one of the four building blocks of RNA, as well as niacin and other compounds that are important for living organisms.

Rock and dust samples retrieved by NASA from the asteroid Bennu exhibit some of the chemical building blocks of life, according to research that provides some of the best evidence to date that ...