Lichens survive frost, radiation, and nearly complete vacuum - which is why they are sent to space experiments. In this lecture, we will explore how their symbiosis works, what results orbital tests have yielded, and why these "silent survivors" are important for future Martian bases. The speaker is lichenologist Zhanna Zholobova. A lichen may seem like an inconspicuous crust on a stone or tree bark, but inside it operates a whole "team": a fungus, an alga, and bacteria. This alliance knows how to survive what sounds like a death sentence for most living organisms - cold, desiccation, nutrient deficiency, and intense ultraviolet radiation. That is why lichens have long intrigued space researchers: they help test where the boundary lies between the "living" and the "preserved". In the lecture, lichenologist Zhanna Zholobova, a junior researcher at the V.L. Komarov Botanical Institute, will explain what experiments with lichens are conducted in orbit and why scientists test their survival limits. You will understand what happens to cells under vacuum and radiation conditions, how symbiosis "activates" protective mechanisms, which pigments and substances help shield light and retain moisture. We will also discuss why sometimes it is more important not to grow, but to have the ability to quickly revive after extreme stress. A separate line of conversation will be practical conclusions. Lichens can serve as a model for searching for biomarkers of resilience, for assessing the impact of the space environment on living systems, and even for developing approaches to "biological maintenance" of future missions. There is no magic here: there will be clear examples of how an experiment is set up, what is considered a result, what limitations the data have, and how they are interpreted. The meeting will be suitable for those who love popular science, follow the topic of planetary exploration, and want to understand how real biological research is conducted, rather than cinematic fantasies. You will be able to ask questions about Mars colonization, life in closed modules, and why resilience is not the same as immortality.