Our Vanishing World: Wildlife

Throughout its history, Earth has experienced five mass extinction events. See, for example, ‘Timeline Of Mass Extinction Events On Earth’. It is now experiencing the sixth.   The Ordovician-Silurian Extinction, which occurred about 439 million years ago, wiped out 86% of life on Earth at the time. Most scientists believe that this mass extinction was precipitated by glaciation and falling[Read More...]
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