Could life on Mars have hidden from extreme weather in a cavern on the Pavonis Mons volcano? This 2011 orbiter image of an otherworldly crater has NASA asking just that
Source:
https://www.newscientist.com/article/mg24532743-100-mysterious-crater-on-mars-could-be-a-good-place-to-look-for-life/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home