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Web11h ago Live Science First-ever close-up of a supermassive black hole sharpened to 'full resolution' by AI, and the results are stunning Astronomers have used machine learning … WebOrdovician-Silurian extinction: ~ 440 million years ago. ... How massive eruptions caused the biggest mass extinction on Earth. Triassic-Jurassic extinction: ~ 201 million years ago. WebScientists believe this crater formed when a giant space rock slammed into Earth some 1.8 billion years ago. The impactor was an estimated 6 to 10 miles (10 to 16 km) across and … porch factory ft pierce