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How to grow snowflakes in a bottle – Science Friday

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If there’s no snow outside, try growing your own snowflakes. From Science Friday‘s collection of Holiday Science features and experiments, learn how to grow snowflakes in a bottle. Caltech physicist, snowflake expert, and author of The Secret Life of a Snowflake Ken Libbrecht shares his snow crystal growing experiment, which requires a large plastic bottle, a bucket, a sponge, fishing line, pins, needles, and dry ice, which is frozen carbon dioxide (CO2).

Reminder: Wear gloves when working with dry ice, which can “burn” your skin if you touch it. Read more about safe dry ice handling here.

Watch more dry ice videos, experiment videos, and videos about ice crystals.

via @scifri.

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