by Elio — Caves cap­ti­vate every­body. They are to­tally un­like our usual land­scape, be­wil­der­ing and chal­leng­ing in de­sign. No won­der that they at­tract ca­sual vis­i­tors and ex­plor­ers alike. Among the lat­ter, we count speleomi­cro­bi­ol­o­gists who search such se­cluded en­vi­ron­ments for un­usual mi­cro­biota. The sub­ject is well de­vel­oped and even the topic of spe­cial­ized meet­ings. But do not think that a cave is just a cave...