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This is Scientific American 60-Second Science. I'm Christopher Intagliata. Got a minute?

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A cracked smartphone screen's no good.

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But future phones may be sold with cracks built in,

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because a network of tiny cracks can actually toughen up a piece of glass.

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The crack research team borrowed the concept from mother-of-pearl, the iridescent stuff in abalone shells.

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It's 3000 times stronger than the mineral it's made of, due to its jigsawlike construction.

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Using a 3-D laser engraver, the tool used to make those glass trophies with a logo floating inside,

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the researchers carved cracks a few microns wide into glass slides, and filled the cracks with polyurethane.

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The resulting glass was 200 times tougher, because the microcracks dissipate energy, preventing larger cracks.

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The study is in the journal Nature Communications.

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The cracks in this study are visible, so, not suitable for a smartphone screen.

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But the researchers say it's possible to shrink them down to less than a micron wide, an imperceptible size.

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As to whether crack-proof screens are a good business model, well, how much are you willing to shell out for an unbreakable phone?

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Thanks for the minute, for Scientific American 60-Second Science. I'm Christopher Intagliata.

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