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Cambrian Period (jan 1, 541000000 BC – jan 1, 485400001 BC)
Added to timeline:
Chordate Evolution over Geologic Time
By
Zahur Ashrafuzzaman
26 Jan 2018
2
0
1640
Date:
jan 1, 541000000 BC
jan 1, 485400001 BC
~ 5883516 years
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