AUTHOR=Ader Magali , Stüeken Eva , Sansjofre Pierre , Algeo Thomas J. , Xie Shucheng TITLE=Editorial: Refining the Interpretation of Nitrogen Isotopes in Deep Time Systems JOURNAL=Frontiers in Earth Science VOLUME=10 YEAR=2022 URL=https://www.frontiersin.org/journals/earth-science/articles/10.3389/feart.2022.966090 DOI=10.3389/feart.2022.966090 ISSN=2296-6463