Purple Biosignatures Around Cool Red Dwarfs: Rethinking Exoplanet Life Detection

To the point

Lígia Fonseca Coelho and colleagues say alien life on planets around cool red dwarf stars could be purple because retinal-based pigments, not chlorophyll, might dominate, producing infrared biosignatures that future telescopes could detect and shifting the search from green to purple.

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Forget Little Green Men, Scientists Now Say Alien Life Is Most Likely Purple
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Forget Little Green Men, Scientists Now Say Alien Life Is Most Likely Purple

Aliens may not be green after all. New research suggests entire planets could appear purple, changing how scientists detect life beyond Earth.