Sandra Markle

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The Case of the Vanishing Golden Frogs: A Scientifi …

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The young scientist's guide to successful science p …

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Weather Electricity Environmental Investigations

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Weird, Wacky Science

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Windy Weather Science (When the wind blows-it's tim …

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Wolves (Growing up Wild)

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Black Widows: Deadly Biters (Arachnid World)

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Family Science

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Gone Forever: An Alphabet of Extinct Animals

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Hyenas (Animal Scavengers)