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Submission + - Signs of Life on Alien Worlds May be Bogus (sciencemag.org)

sciencehabit writes: Call it the cosmic version of fool’s gold. What was once considered a sure-fire sign of life on distant planets may not be so sure-fire after all, a new study suggests. The signal—a strong chemical imbalance in the planet’s atmosphere that could only be generated by thriving ecosystems—could instead be the combined light from a lifeless exoplanet and its equally barren moon.
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Signs of Life on Alien Worlds May be Bogus

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He keeps differentiating, flying off on a tangent.

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