The Earth's story begins with the Hadean Eon. Journey into Earth's past with a vibrant Hadean Eon poster, exploring the time when the oldest known Earth rocks formed, enduring heavy asteroid bombardment, and witnessing the development of a solid crust. The Hadean atmosphere was primarily composed of volcanic gases like Helium (He), Hydrogen (H2), Sulfur Dioxide (SO2), Carbon Dioxide (CO2), Methane (CH4), and Ammonia (NH3). In this period, the first Zircon Crystals started to form and the emergen