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There are many theories as to why the dinosaurs became extincy, ranging from climate changes, to loss of food supplies, to fatal diseases.

A prominent theory is that a large asteroid struck the Earth, throwing up a dust layer that blocked sunlight and caused most plants to die off. In the colder climate, and without their major source of food, the dinosaurs dwindled in population until there were not enough adults to maintain their species.

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13y ago

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