Earth formed about 4.54 billion years ago from the accretion of dust and rock within the young Solar System.
- Spark of Life - a story from 4.2 billion years ago - Alien Life and Frozen Life
- Hitchhiker's Life in the Galaxy - Rivers and Gardens
HTML5 mp4 https://david.hitchhikers.earth/assets/history-of-the-earth/History%20of%20the%20Earth%20%5BQ1OreyX0-fw%5D.mp4#t=16 History of Earth
The surface was initially dominated by intense volcanism, frequent asteroid impacts and a turbulent atmosphere rich in carbon dioxide, nitrogen, water vapour, methane and ammonia. Liquid water condensed as the planet cooled, forming the first oceans while the crust stabilised into early proto-continents - wikipedia ![]()
During this period Earth lacked free oxygen. Radiation from the young Sun, lightning and hydrothermal activity created a chemical environment capable of producing organic molecules such as amino acids, simple sugars and lipid structures. These compounds accumulated in the oceans and around volcanic vents.
- First Life (c. 4.2–3.5 Billion Years Ago) - Rise of Oxygen (3.5–2.4 Billion Years Ago) - Complex Cells (2.1–1.2 Billion Years Ago) - Cambrian Expansion (541 Million Years Ago) - Life on Land (c. 470–360 Million Years Ago) - Age of Dinosaurs (252–66 Million Years Ago) - Human Origins: (6 Million Years Ago to Present)
- First Green Land (420 Million Years Ago)