Anonymous18 days ago
A landmark study published in Nature Astronomy confirms that all five canonical nucleobases — adenine, guanine, cytosine, thymine, and uracil — have been detected in pristine samples from asteroid Ryugu, collected by JAXA's Hayabusa2 mission. The discovery, combined with similar findings from NASA's Bennu samples, provides the strongest evidence yet that carbonaceous asteroids may have delivered the complete molecular building blocks of DNA and RNA to early Earth, bolstering theories about the cosmic origins of life.