Prince Rupert's drop - Wikipedia
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/https://tf-cmsv2-smithsonianmag-media.s3.amazonaws.com/filer/fa/99/fa99112a-7cef-4729-9658-690ee4e91f0f/drops_2.jpg "The 400-Year-Old Mystery of These Bullet-Shattering Glass Drops May Finally Be Solved | Smart News| Smithsonian Magazine")
The 400-Year-Old Mystery of These Bullet-Shattering Glass Drops May Finally Be Solved | Smart News| Smithsonian Magazine
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