We've been searching for life on Mars for a long time, but so far we've come up empty. The fundamental problem is a Catch-22 involving two of the key ingredients for life. Life as we know it needs liquid water and reasonable temperatures, both of which are available on Mars, but hardly ever at ...

Source: [Phys.org](https://phys.org/news/2026-09-tiny-salt-crevices-miniature-greenhouses.html)

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