Laughing gas may have helped warm early Earth and given breath to life

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Laughing gas and the mystery of Carl Sagan's Faint Young Sun Paradox: When the sun shone dimmer an eon ago, Earth remained warm in spite of it likely thanks to a mix of greenhouse gases. Biogeochemists have now shown how N20, known today for its use as a dental anesthetic, may have made it into the mix.
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Laughing gas may have helped warm early Earth and given breath to life was originally posted by Health Nutrition And Fitness News