30 июл 443000000 г. до нашей эры - Ordovician-Silurian mass extinction

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As the third largest extinction in earths history, covering two peak dying times, 85% of sea life was drastically reduced in number. An ice age due to climate change and fall in sea level has been blamed on the extinction of the trilobites, brachiopods and graptolites of this time, messing with the chemistry of the oceans.

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