AUTHOR=Yizhaq Hezi , Silvestro Simone , Kroy Klaus TITLE=Editorial: Physics and Geomorphology of Sand Ripples on Earth and in the Solar System JOURNAL=Frontiers in Earth Science VOLUME=9 YEAR=2021 URL=https://www.frontiersin.org/journals/earth-science/articles/10.3389/feart.2021.780100 DOI=10.3389/feart.2021.780100 ISSN=2296-6463