Before Humanity

The Early History of the Universe
From the Big Bang (13.8 billion years ago) to the formation of the Sun (4.68 billion years ago).
The Hadean Eon
From 4.68 billion years ago to 4 billion years ago.
The Archean Eon
From approximately 4 billion years ago to 2.5 billion years ago
The Proterozoic Eon
From approximately 2.5 billion years ago to 541 million years ago.
The Cambrian Period
From approximately 541 million years ago to 485.4 million years ago.
The Ordovician Period
From approximately 485.4 million years ago to 443.8 million years ago
The Silurian Period
From approximately 443.8 million years ago to 419.2 million years ago.
The Devonian Period
From approximately 419.2 million years ago to 358.9 million years ago
The Carboniferous Period
From approximately 358.9 million years ago to 298.9 million years ago.
The Permian Period
From approximately 298.9 million years ago to 252.17 million years ago
The Triassic Period
From approximately 252.17 million years ago to 201.3 million years ago
The Jurassic Period
From approximately 201.3 million years ago to 145.5 million years ago
The Cretaceous Period
From approximately 145.5 million years ago to 66 million years ago
The Paleogene Period
From approximately 66 million years ago to 23.03 million years ago
The Neogene Period
From approximately 23.03 million years ago to 2.58 million years ago
The Quaternary Period
From approximately 2.58 million years ago to the start of recorded history

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