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In search for alien life, purple may be the new green


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In search for alien life, purple may be the new green


From house plants and gardens to fields and forests, green is the color we most associate with surface life on Earth, where conditions favored the evolution of organisms that perform oxygen-producing photosynthesis using the green pigment chlorophyll a.

But an Earth-like planet orbiting another star might look very different, potentially covered by bacteria that receive little or no visible light or oxygen, as in some environments on Earth, and instead use invisible infrared radiation to power photosynthesis. Instead of green, many such bacteria on Earth contain purple pigments, and purple worlds on which they are dominant would produce a distinctive “light fingerprint” detectable by next-generation ground- and space-based telescopes, Cornell scientists report in new research.

Read More: ➡️ Cornell University


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