jan 1, 252000 BC - Permian Extinction

Description:

The permian exctinction is known as one of the most severe mass extinctions in the history of earth. Occurring around 252 million years ago, it wiped out approximately 95% of marine species and 70% of land species (9). While the causes of this event are still debated, it mostly was due to mass amounts of volcanic eruptions, climate change and a lack of oxygen in the water (ocean anoxia) (9). These changes affected the atmosphere, with mass amounts of carbon dioxide and methane from the volcanic activity, leading to global warming and even acid rain. The ocean became acidic due to this, on top of the lack of oxygen from the large amount of carbon dioxide replacing it. These eruptions also effected the geosphere, with its vast amounts of lava flows altering the shape of the Earth's surface.

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