AUTHOR=Kyriakopoulos Christodoulos , Barth Nicolas C. , Koelemeijer Paula , Winterbourne Jeff , Toussaint Renaud TITLE=3D Printing in Geology and Geophysics: A New World of Opportunities in Research, Outreach, and Education JOURNAL=Frontiers in Earth Science VOLUME=9 YEAR=2021 URL=https://www.frontiersin.org/journals/earth-science/articles/10.3389/feart.2021.734291 DOI=10.3389/feart.2021.734291 ISSN=2296-6463