15 major events in the history of earth

15 Major Events in the History of Earth Student’s Name Institutional Affiliation 15 Major Events in the History of Earth The history of the earth is long and has consisted of various incidents. Here are 15 of the major events in the history of Earth: 1 4.6 billion years ago: Formation of Earth Various theories indicate the formation of Earth 4.6 billion years ago. One of the scientific theories shows that the Earth was born from a swirling disk of gas and dust in the early solar system. 2 4.1 to 3.8 billion years ago: The great bombardment The great bombardment period was vital for a range of formations on earth. The intense asteroid and comet impacts shaped the early Earth. The bombardments also triggered the formation of the moon. 3 4 billion years ago: Formation of oceans Oceans on the earth’s surface were formed 4 billion years ago after water vapor released from the earth’s crust condensed on the surface to form large water bodies. This marked the onset of the hydrosphere, which would form an integral component of life on Earth. 4 3.8 billion years ago: Beginning of life 200 years after the formation of oceans, simple life forms like single-celled organisms began to emerge. Life is believed to have begun in the oceans. 5 2-2.4 billion years ago: The great oxygenation This period marked the emergence of cyanobacteria and other forms of synthetic bacteria. The bacteria released oxygen into the atmospher...