7. Deep Sea Hydrothermal Vents
Earth’s deep sea hydrothermal vents are home to extraordinary life forms that rely on chemical energy, not sunlight, for survival. These alien-like ecosystems inspire scientists searching for life in similar environments elsewhere, such as the subsurface oceans of Europa. By studying how organisms flourish in such extreme conditions, researchers gain vital clues about how life might exist far beneath the ice of other worlds. Explore more at NOAA.