DMS on K2-18b: A Potential Biosignature and the Debate Over Defining Life

To the point

Although Nikku Madhusudhan’s team reports possible dimethyl sulfide in the atmosphere of exoplanet K2-18b, a Hycean world, Christopher Glein cautions it isn’t a smoking gun and Campbell Rider argues we must develop Earth-agnostic, non-Earth-centric ways to recognize life, because past biosignatures have misled us and alien life could look very different from Earth life.

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Scientists claim to have found evidence of alien life. But ‘biosignatures’ might hide more than they reveal
theconversation.com

Scientists claim to have found evidence of alien life. But ‘biosignatures’ might hide more than they reveal

Looking at the history of ‘biosignature’ discoveries shows why they can be problematic.