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Speaker 1: Welcome to brain Stuff from house stuff works dot com

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Speaker 1: where smart happens. Hi Am Marshall Brain with today's question,

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Speaker 1: how do you make clear ice cubes? If you live

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Speaker 1: in an area where icicles form in the winter, you

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Speaker 1: know that icicles are normally clear and beautiful. There are

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Speaker 1: two things that make icicles so perfect. First, icicles are

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Speaker 1: made from pure water in the form of melted snow,

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Speaker 1: and second, icicles are created in layers. Water drips down

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Speaker 1: the icicle and freezes in progressive layers rather than freezing

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Speaker 1: all at once, the approach of voids and trapped bubbles.

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Speaker 1: If you ever look inside a restaurant ice maker, you'll

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Speaker 1: find that it makes ice and layers. Also, cold water

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Speaker 1: runs continuously over a plate or a grid where the

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Speaker 1: ice is forming, and the ice cubes or ice discs

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Speaker 1: in some machines grow in layers. If you would like

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Speaker 1: to try creating clear ice at home, start with distilled

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Speaker 1: water to eliminate any minerals, and then boil it to

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Speaker 1: eliminate air dissolved in the water. Make the cube small

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Speaker 1: or thin to get closer to the way that icicles

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Speaker 1: are formed. Do you have any ideas or suggestions for

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Speaker 1: this podcast? If so, please send me an email at

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Speaker 1: podcast at how stuff works dot com. For more on

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Speaker 1: this and thousands of other topics, go to how stuff

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