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).
Watch more dry ice videos, experiment videos, and videos about ice crystals, including:
• The scientist that grows ‘identical twin snowflakes’
• Go on a Snowflake Safari
• Watch snowflakes form in time lapse through a microscope