Clip of quote: This is the hardest substance known to our science. Clip of quote: This is the hardest substance known to our science. Yarn is the best way to find video clips by quote. Find the exact moment in a TV show, movie, or music video you want to share. Easily move forward or backward to get to the perfect spot. It's available on the web and also on Android and iOS.
This is the hardest substance known to our science.
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This is the hardest substance known to our science.
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