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The history of Earth is divided into four great eons, starting 4,540 mya with the formation of the planet. Each eon saw the most significant changes in Earth's composition, climate and life.
Slide through the timeline above to explore how the globe has changed over seven major “snapshots” in our climate history, and to see how it might look in the far future.
This article assembles some of the key events. From evolution to extinction, these are events that have unfolded as part of the Earth timeline. Though opinions vary, we’ve leaped through 4.5 billion years of Earth’s history and provided a general guideline.
Over 4.5 billion years ago, our solar system formed from a giant molecular cloud that collapsed under its own tremendous gravity. The hot stew of hydrogen and helium gave birth to our sun and flung out a wide disc of gas and particles in the surrounding space.
Follow the history of our home planet over billions of years, from a molten ball of lava to the thriving life of today
Understanding Earth's timeline provides insight into our planet's past and offers valuable lessons for our future. How did life begin, and what events led to the incredible diversity we see today? What can the past tell us about our current challenges, such as global warming and biodiversity loss?
This timeline of natural history summarizes significant geological and biological events from the formation of the Earth to the arrival of modern humans. Times are listed in millions of years, or megaanni (Ma).
A history-of-Earth timeline includes everything from the birth of the sun and solar system to present-day earthquakes in California. Changes over the past 4.6 billion years were usually slow and incremental, but also sometimes violent and unforeseen, like giant meteorite strikes.
The geologic time scale (GTS) is a system of chronological dating that relates geological strata (stratigraphy) to time, and is used by geologists, paleontologists, and other Earth scientists to describe the timing and relationships of events that have occurred during Earth's history.
A Timeline of the Eons’s, Era’s, & Periods. The development of life over the last 3,700 million years of the Earth's history is one of the great stories told by modern science. During most of this time living things left only traces to indicate their existence.