Origins of Life: Earth History and Astrobiology

How did life transition from non-living chemistry to the complex organisms we see today? Understanding the origins of life requires looking at the deep history of our planet and the cosmic conditions that made it possible. In this written course, you will trace the co-evolution of Earth and its living systems over four billion years. You will transition from learning foundational geological and biological concepts to exploring modern scientific methods used to detect biosignatures on other planets. What you'll learn: - Understand the fundamental chemical and physical conditions required for the emergence of life - Explore the modern Tree of Life and how genetic sequencing has revolutionized evolutionary history - Trace the co-evolution of Earth's atmosphere, oceans, and early life forms - Examine the transition from simple single-celled organisms to complex multicellular life - Analyze the criteria for planetary habitability and the modern search for biosignatures on exoplanets The course begins with foundational definitions of life and early Earth chemistry before moving chronologically through major evolutionary milestones and concluding with modern astrobiology concepts. It is designed for curious beginners, science enthusiasts, and anyone interested in biology or astronomy, with no prior scientific background required. Start your journey into deep time and discover how life shaped our world and potentially others.