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24 nov 544000000 año aC - The sea pen became extinct about 544 million years ago.

Descripción:

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

Añadido al timeline:

laura nguyen timeline

26 oct 2018

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fecha:

24 nov 544000000 año aC

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~ 5883516 years ago

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