You probably haven't given much thought to the fact that there's a slab of chemically strengthened glass in your pocket, deflecting blows from keys or change or any other hard objects might slide or scrape or scratch against it, or that the hundreds of millions of similar slices of glass lining pockets around the world wasn't possible not so long ago.
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Source: http://feeds.gawker.com/~r/gizmodo/full/~3/_wVkfgZ-XnQ/how-glass-changed-the-world++over-and-over-again
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