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.
