Events The Rise of Oxygen in Earth’s Atmosphere (around 2.4 billion years ago): This significant increase allowed for more complex life forms to develop. 1 year agoby Cedrix Rutto
Events The Cambrian Explosion (around 541 million years ago): A period of rapid evolution where most major animal phyla appeared in the fossil record. 1 year agoby Cedrix Rutto
Events Origin of Life on Earth (around 3.5 billion years ago): The beginnings of life, from single-celled organisms to complex beings. 1 year agoby Cedrix Rutto
