Spring |
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Stars |
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Stars, Galaxies, and the Milky Way |
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6.5 |
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Star Spotters: Telescopes and Observatories |
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6.2 |
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Sun |
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Superstorm Sandy |
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7.2 |
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Terrorism Alert! |
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7.7 |
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The Astronauts: Space Survival |
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6.0 |
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The Carbon Cycle |
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6.8 |
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The Earth: Our home planet |
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5.7 |
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The Moon |
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4.0 |
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The Moon |
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The Moon: Earth's Neighbor |
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5.5 |
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The Moon in a Month |
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2.5 |
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The Nitrogen Cycle |
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7.0 |
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The Planets |
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3.8 |
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The Role of Water on Earth |
NEW
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The Science of Catastrophe (4 titles) |
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The Solar System |
NEW
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The Solar System, Meteors, and Comets |
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6.4 |
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The Space Shuttle |
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The Stars |
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3.7 |
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The Stars: Glowing Spheres in the Sky |
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5.4 |
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The Sun |
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