A team of astronomers led by Nikku Madhusudhan at Cambridge University has re-examined data suggesting a super-Earth 124 light years away, K2-18b, harbors an atmosphere with molecules not typically found in biology. The original claim sparked debate on the existence of alien life.
Source: https://www.newscientist.com/article/2480740-astronomers-double-down-on-claim-of-strongest-evidence-for-alien-life