Prehistoric Scratchpad

Timeline of earth's history in galactic years

In this list, 1 galactic year (GY) = 225 million years Hadean Eon (0 GY)

  • 0 GY: Birth of the Sun

Archean Eon (3 GY)

Proterozoic Eon (9 GY)

Phanerozoic Eon (18 GY)

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