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Endoliths are organisms that live inside rocks, minerals, or other geological materials. They can be found in various environments, including hot and cold deserts, polar regions, and deep within the Earth's crust. These organisms play a crucial role in rock and mineral weathering processes, contributing to the cycling of elements and the formation of soils. Some examples of endolithic organisms include bacteria, algae, fungi, and lichens. They possess unique adaptations that allow them to survive in the harsh conditions within rocks, such as extreme temperatures, low moisture levels, and limited access to nutrients. Their presence and activities can lead to the formation of distinctive features on rock surfaces, including pitting, etching, and discoloration. P. Geo. Ricardo A Valls, M. Sc. and Geo Gadfly Valls Geoconsultant ORCID ID- https://orcid.org/0000-0002-5421-0914 Scopus Author ID: 7003369619/35335510700 ResearcherID: S-6604-2018 If you like this content, please "buy me a coffee" https://www.buymeacoffee.com/goldendroplets