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Scientists have found dust from the asteroid that wiped out the dinosaurs inside the crater it left

By Queenie Hoi Shan Chan, Lecturer in Earth Sciences, Royal Holloway

More than 99% of all organisms that have ever lived on Earth are now extinct. Most of these just died out quietly. However, in Earth’s history there have been five major mass extinction events – known as the big five – during which many species became extinct at the same time.

Each of the big five events caused at least a 40% loss of all species on Earth.…

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