The Earth's History

Earth's history spans about 4.6 billion years, beginning with its formation from dust and gas in the early solar system. Over time, the planet cooled and oceans formed. Life first appeared in the oceans over 3.5 billion years ago, starting with simple microorganisms. Complex life evolved gradually, with the first land plants and animals appearing hundreds of millions of years later. Major events include mass extinctions and geological changes that shaped the continents and climate. Humans emerged relatively recently, about 200,000 years ago, and have significantly impacted Earth's environment. This history reflects a dynamic planet constantly evolving over deep time.