From the BBC’s The Secret Life of Ice, an experiment for your DIY/ Gotta Try This list:

Dr Gabrielle Walker and Dr Andrea Sella investigate the molecular make up of ice crystals. They use supercooled water to create a mass of ice crystals instantly and discover why water expands as it freezes into ice.

Want to try it? Here are two methods for doing the experiment.

Watch more BBC videos in the archives, as well as more of Dr. Sella, and more ice crystal videos.

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