National Geographic science chapters
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2)
All about light
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3)
Amazon journey: cruising the rain forest
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4)
Ancient orbiters: a guide to the planets
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5)
Devouring flames: the story of forest fires
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6)
Into the earth: the story of caves
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9)
Mysteries of the fossil dig: how paleontologists learn about dinosaurs
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10)
Mysteries of the sea: how divers explore the ocean depths
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17)
Weedy sea dragons, spitting cobras, and other wild and amazing animals
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21)
Underground towns, treetops, and other animal hiding places
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22)
Wetlands journey
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