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6 dic 520 anni a. C. - признак начала Палеозойской эры. В многочисленных мелководных морях процветали морская флора и фауна. Особенно широко были распространены трилобиты.

Aggiunto al nastro di tempo:

Водопьянова Олеся ЭБ17-02Б

ByОлеся Водопьянова
28 ott 2018
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Data:

6 dic 520 anni a. C.
Adesso
~ 2548 years ago
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