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The Volcanoes That May Have Started Life on Earth

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The nitrogen cycle is essential to life on Earth, but biological nitrogen must be fixed before it can be used. Scientists aren't sure how the first nitrogen became available... but it might have been volcanoes.

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Sources:
https://www.pnas.org/cgi/doi/10.1073/pnas.2309131121
https://www.sciencedirect.com/science/article/pii/S0012825216301829?casa_token=9umXxL32wsMAAAAA:5NVjUVqnIEkqCK0mGURkYM2TKvAY6mIvDRIiQA0rvNC0fR6UvNC_AToeaP_d57viQTiFKnGJrQ
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Image Sources:
https://www.gettyimages.com/detail/illustration/diagram-of-nitrogen-cycle-royalty-free-illustration/1255690597?phrase=nitrogen
https://www.gettyimages.com/detail/video/flyover-france-england-and-northern-ireland-view-from-stock-footage/637663752
https://science.nasa.gov/earth/earth-atmosphere/the-atmosphere-earths-security-blanket/
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https://www.gettyimages.com/detail/photo/twilight-farm-chemical-factory-in-nw-iowa-royalty-free-image/172987950?phrase=nitrogen+factory
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https://www.gettyimages.com/detail/photo/sunbean-of-sunset-sky-royalty-free-image/497709519?phrase=light+rays
https://www.gettyimages.com/detail/photo/aerial-drone-view-of-waves-royalty-free-image/1488335104?phrase=water
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