Water, for example, has a melting temperature of 0 degrees C. (An ice slush is just small chunks of solid ice in liquid water, not a malleable substance.) Compare that to water which is either a freely flowing liquid or a solid.
Technically it’s a non-crystalline solid that smoothly changes from a hard solid to a soft malleable substance when heated, and only becomes a true liquid at much higher temperatures. You may have heard that glass is a liquid, which is not quite correct. Most of us don’t really know what glass is. Even if you don’t think you’re interested, read along. Glass is actually way more awesome than you think. If you’re interested, read along and I’ll show you why making glass, drinking wine, and having bad vision are the three pillars that led to the development of science and Western civilization. I know what you’re thinking and I agree the wheel isn’t as important as the other 5. So I thought I’d write about the history of glass from around the beginning of time, up until when we started using it to make awesome lenses.Ī strong argument can be made that the most important advances humanity ever made are fire, stone tools, the wheel, metalworking, the domestication of animals, and glass production. But I’ve never looked into the history of glass as just a substance, because, well, who cared? When I accidentally did some reading about early glass, though, I was rather amazed at just how important it was. I’ve written about glass, as in lenses, for years now.
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