History of the Earth

The history of the Earth describes the most important events and fundamental stages in the development of the planet Earth from its formation 4.578 billion years ago to the present day.[1] Nearly all branches of natural science have contributed to the understanding of the main events of the Earth's past. The age of Earth is approximately one-third of the age of the universe.[2] Immense geological and biological changes have occurred during that time span. See the headings of the Table of Contents below for a summary of the eons of Earth's history.
Contents [hide]
1 4.6 Ga: Solar System
1.1 Origin of the Earth's core and first atmosphere
2 4.54 Ga: Hadean and Archaean eons
2.1 4.52 Ga: The giant impact hypothesis
2.2 4.3 Ga: Oceans and atmosphere
2.3 4.0 Ga: The first continents
2.4 3.5 Ga: Life
3 Proterozoic eon
3.1 3.0 Ga: Oxygen revolution
3.2 2.3 Ga: Snowball Earth and ozone layer
3.3 2.0 Ga: Proterozoic development of life
3.4 Supercontinents in the Proterozoic era
3.5 Late Proterozoic climate and life
4 Phanerozoic eon
4.1 Paleozoic era
4.1.1 542 Ma: Cambrian explosion
4.1.2 Paleozoic tectonics, paleogeography and climate
4.1.3 Colonization of land
4.2 Mesozoic era
4.3 Cenozoic era (Recent life)
4.3.1 2 Ma: Human evolution
4.3.2 10,000 ya: Civilization
4.3.3 75 ya: Recent events
5 See also
6 Notes
6.1 References
6.2 Literature
6.3 External links



stock Clipart
Bubble Shooter