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Highly visible even in total darkness,... |
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The original and still the best. This... |
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Hold it in your hot little hand and... |
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Build your own low temperature... |
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Spinning so fast it'll balance on your... |
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You don't have to be an egg-head to... |
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The physics-defying rattleback has only... |
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Ever wondered about the very beginnings... |
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Your very own hologram chamber. Place... |
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First documented by Leonardo da Vinci,... |
