Prehistory

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For our purposes Prehistory refers to the history of the Earth from it's accretion to the emergence of Humanity.

Hadean Eon

4.54-4 billion years ago.

The Newly formed Earth was a hellscape of volcanoes, lava flows and toxic gases. Another planet called Theia crashed into the earth, with the ejecta kicked up by the impact forming our Moon.

Archaen Eon

4 to 2.5 billion years ago

Things calm down and cool off, with vulcanism slowly declining. The soup of toxic volcanic gasses give rise to massive rainstorms which fill up the oceans. From this churning chemical soup heated by geothermal vents emerge organic chemicals, some of which form into complex structures and some of which begin to replicate. Eventually giving rise to the earliest life-forms, simple single celled creatures floating about in the ocean.

Proterozoic Period

2.5 billion to 540 million years ago

Phanerozoic Eon

The Period in Earth's History in which life really takes off.

Cambrian Period

540 to 485 million years ago

Ordovician Period

485 to 444 million years ago

Silurian Period

444 to 420 million years ago

Devonian Period

420 to 360 million years ago

Carboniferous Period

360 to 299 million years ago

Permian Period

299 to 252 million years ago

Triassic Period

252 to 201 million years ago

Jurassic Period

201 to 145 million yeas ago

Cretaceous Period

145 to 66 million years ago

Cenozoic Period

66 million years ago to know

The Appeal of Prehistory

Historical Time Periods
Deep Time:	Prehistory
Premodern:	Stone Age - Bronze Age - Classical Period - Dark Age - High Middle Ages - Renaissance
Modern:	Age of Enlightenment - Industrial Revolution - The World Wars - The Cold War - Post-Cold War