AUTHOR=Sellam Youcef , Gruchola Salome , Tulej Marek , Keresztes Schmidt Peter , Riedo Andreas , Meddane Sofiane , Wurz Peter TITLE=The search for ancient life on Mars using morphological and mass spectrometric analysis: an analog study in detecting microfossils in Messinian gypsum JOURNAL=Frontiers in Astronomy and Space Sciences VOLUME=12 YEAR=2025 URL=https://www.frontiersin.org/journals/astronomy-and-space-sciences/articles/10.3389/fspas.2025.1503042 DOI=10.3389/fspas.2025.1503042 ISSN=2296-987X