Por Que Era Quase Impossível Criar o LED Azul

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The Most Important Material Ever Made

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I built a QR code with my bare hands to see how it works

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This is why we can't have nice things

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The rise of Xi Jinping, explained

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Laser vs. Relâmpago - Qual é mais poderoso?

27:20
Why Don’t Railroads Need Expansion Joints?

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The billion dollar race for the perfect display

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