Exploring Mars and icy moons like Europa and Enceladus is crucial for discovering potential habitats for life in our solar system. Mars' watery past makes it worth investigating for signs of ancient life, while Europa and Enceladus hold promise due to their subsurface oceans. These hidden oceans may provide habitats suitable for living organisms. Scientists believe that Mars-like environments and conditions on icy moons could support life and leave specific clues known as biosignatures. Understanding these potential biospheres and their signs may help us uncover life forms in these icy worlds.