#KnowledgeByte: An #Alien #Biosignature is any observable feature—such as a substance, pattern, or phenomenon—that provides scientific evidence of past or present life beyond Earth.

Scientists look for these "fingerprints of life" in the atmospheres and on the surfaces of planets and moons.

https://knowledgezone.co.in/posts/Alien-Biosignature-69b9060ffa60ffdd1b7b92e7