Researchers scanning the atmospheres of exoplanets for gases produced by living creatures should hunt for more than just oxygen, methane and other "biosignatures" that swirl about in Earth's air, MIT's Sara Seager says.
Researchers scanning the atmospheres of exoplanets for gases produced by living creatures should hunt for more than just oxygen, methane and other "biosignatures" that swirl about in Earth's air, MIT's Sara Seager says.
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