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10. 50,000 years ago, an asteroid slammed into Earth with the strength of 20 million tons of TNT. The result was Meteor Crater, Earth’s best-preserved crater, in northwest Arizona.
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9. In 2018, scientists found an impact crater wider than Paris 1,000 feet below the Hiawatha Glacier in Greenland. Scientists think the offending asteroid hit sometime between 12,000 and 3 million years ago with the energy of 45 Hiroshima bombs.
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