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Answer:

They first appeared in the fossil record around 66 million years ago, soon after the Cretaceous–Paleogene extinction event that eliminated about three-quarters of plant and animal species on Earth, including most dinosaurs.

Explanation:

TheBlueFox

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Scientists believe that early human beings may have originated in Africa.

Africa is the second largest continent after Asia and is 3 times bigger than the United States of America. Africa covers around 1/5 of our planet.

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