NASA’s OSIRIS-REx mission has performed detailed analyses of the asteroid Bennu, which revealed signs of ancient flowing water
Source:
https://www.newscientist.com/article/2256626-asteroid-bennu-was-once-part-of-a-space-rock-with-flowing-water/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home