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    Germs & your health

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    Ecology fundamentals

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    The open source revolution

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    Core meteorology. Atmosphere

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    Project Nim

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    Vanishing of the bees

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    Hail Columbia!

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    Saving the life keepers

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    Core meteorology. Weather

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    The endless voyage. 16, On the coast

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    Earth and you

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    So right so smart

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    Core meteorology. Climate

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    Electricity

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    Yellowstone : land to life

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    Surviving progress

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    Biotechnology and your health

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    Changes on earth

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    The ultimate journey

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    Sound = El sonido

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    Waves = Las ondas