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

Recent James Webb Space Telescope observations suggest potential alien life on exoplanet K2-18b, detecting dimethyl sulfide (DMS), a biosignature on Earth. Past astrobiology findings, like those on Mars and Venus, have proven inconclusive, highlighting the challenge of defining life beyond Earth's chemistry. Scientists and philosophers must collaborate to develop broader definitions of life to recognize novel extraterrestrial forms.

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