extinction, No longer living, dinosaurs, terrible lizard, The Mesozoic era, The age of dinosaurs, Paleontologist, people who study dinosaurs, Time that dinosaurs live on Earth, 230 - 65 million years, age of dinosaurs continued, 160 million years, cause of the extinction, might be a volcano or asteroid, Who wrote the book about dinosaurs?, Micheal Crichton, Name of the book, Jurassic Park, past continuous, was writing, present continuous, is writing

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