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Want to Find Life? See What's Missing in an Atmosphere
In the search for life, astrobiologists have proposed that various chemicals, like methane, could be potential biosignatures. But a new study suggests that missing chemicals might make an even stronger case there's life in the world. For example, if a terrestrial planet has much less carbon dioxide in its atmosphere than other planets in the same system, life could cause the difference. Fortunately, this is the kind of signal JWST could search for.
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