NASA's new James Webb Space Telescope will be able to sniff out methane. Here's how to tell if it's a sign of life. - Space.com

Researchers lay out a framework explaining how methane could be a biosignature rather than a false alarm.

The first whiff that humans catch of life beyond Earth might be methane, but scientists will need to tread carefully before declaring a discovery based on the chemical. If an exoplanet's atmospher… [+2962 chars]

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