Planets With Hydrogen-Rich Atmospheres Could Harbor Life

Microbes can live and grow in an atmosphere of pure hydrogen, lab experiments show. The finding could widen the range of environments where astronomers seek signs of alien life. “We’re trying to expand people’s view of what should be considered a habitable planet,” says exoplanet astronomer Sara Seager of MIT. “It seems to increase our chances that we may find life elsewhere.”


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