Mood Rings Science and History
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The Power, Secret Meaning & History: Why Gentlemen, Gangsters & Entrepreneurs Wear Pinky Rings
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DoubleSpeak, How to Lie without Lying
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Color Changing Mood Rings that Sell: Your Path to Extra Income
27:11
You're Probably Wrong About Rainbows
12:22
coin for jewelry - how to make ring out of coin
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The Joker's Bank Heist Plan is Terrible
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Why Some Designs Are Impossible to Improve: Quintessence
5:31