Alternative Earths team members recently published a paper to 'Astrobiology,' considering the potential for false negatives, biospheres that are not evident in detecting a planet's atmosphere. Chris Reinhard, Stephanie Olson, Eddie Schwieterman and Tim Lyons led a study using geochemical proxies, in combination with Earth-system models, to look at terrestrial biosignatures as an analogy for other ocean-bearing planets. The team suggests that the strongest candidates for habitability may have the least obvious clues.

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