Lichens are fascinating organisms that form a unique partnership between fungi and algae or cyanobacteria. This relationship allows them to thrive in various environments, from rocky surfaces to tree bark. The fungal component provides structure and protection, while the algal or cyanobacterial partner produces food through photosynthesis. These resilient organisms can survive extreme conditions, such as drought and cold temperatures. Lichens play an essential role in ecosystems by breaking down rocks into soil and serving as indicators of air quality. They are often found in forests, mountains, and even urban areas, showcasing their adaptability and importance in nature.