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5 Mass Extinction That Has Occurred on Earth

Triassic Period
Major disasters have occurred on the earth such as meteor showers until ancient Merapi volcano erupted making living species declined dramatically. The disaster left nearly 95 percent of the species on the earth extinct at that time. Here are the top 5 mass extinction that has occurred on earth. 1. Ordovician Period 445 Million Years Ago Mass extinction is caused by global cooling and a decrease in...