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A new 'atmospheric disequilibrium' could help detect life on other planets
"As NASA's James Webb Space Telescope and other new giant telescopes come online they will need novel strategies to look for evidence of life on other planets. A University of Washington study has found a simple approach to look for life that might be more promising than just looking for oxygen."
https://www.sciencedaily.com/releases/2018/01/180124141603.htm