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Categories: Science fiction Fantasy Mystery Romance Business Classic Sports Young adult Humor Memoirs See all categories... |
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Categories: Science fiction Fantasy Mystery Romance Business Classic Sports Young adult Humor Memoirs See all categories... |
Full-color photos. Explore the origins of life on earth, from the first algae to the first humans; why life began in the sea, not on land; why dinosaurs ruled the earth for millions of years and then disappeared; and how mammals--and then humans--took over.