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dec 1, 544000000 BC - sea pen

Description:

http://www.ucmp.berkeley.edu/cnidaria/pennatulacea.html

The sea pen went extinct 4.6 billion years ago.

Added to timeline:

new timeleine

ByNatalia Soto
26 Oct 2018

Date:

dec 1, 544000000 BC
Now
~ 5883516 years ago

Images:

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