Right? In 2015, there was this: "NASA confirms the best-ever evidence for water on Mars" https://www.washingtonpost.com/news/speaking-of-science/wp/2015/09/28

Right? In 2015, there was this: "NASA confirms the best-ever evidence for water on Mars" https://www.washingtonpost.com/news/speaking-of-science/wp/2015/09/28/new-evidence-of-liquid-water-on-mars-confirmed-by-nasa/ https://www.washingtonpost.com/news/speaking-of-science/wp/2... From your link: "This implies that RSL are not fed by large, near-subsurface aquifers, but are instead the result of either small ( < 120 km diameter) aquifers, deliquescence of perchlorate and chlorate salts or dry, granular flows." Keyword there is "granular flows" Here's another source for similar findings a few months prior. "Granular flows at recurring slope lineae on Mars indicate a limited role for liquid water" https://www.nature.com/articles/s41561-017-0012-5 https://www.nature.com/articles/s41561-017-0012-5 I too remain skeptical.