Part 9/9:
Eukaryotes serve as a window into the deep history of life, illustrating how complex cellular structures and energy systems originated in Earth's primordial environment. The study of mitochondria, hydrothermal vents, and Earth's geochemistry provides a multidisciplinary framework for exploring how life began, evolved, and potentially exists elsewhere. This convergence of biology and geology not only deepens our understanding of life on Earth but also opens avenues for discovering life’s universal principles across the cosmos.