Water
In Our Time
00:00
The Unusual Qualities of Water
Andrew Keen: Water is a funny material, because it's so common. We assume that liquids and solids like ice are very typical, he says. He explains how water holds together in a completely different way to other molecules. And as we cool water down, it does something very, very peculiar,. At a temperature of about four degrees, it contracts down until you get to four degrees - then suddenly it starts to do something different.
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