Why does water expand when it freezes? - Naked Science Scrapbook
Why does ice float in the cool summer drink of your choice? And why don't ponds and lakes freeze from the bottom up, killing all the fish? Find out with the latest Naked Science Scrapbook, where we'll see that it's all down to the weird and wonderful water molecules...More videos and podcasts from http://www.thenakedscientists.com
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