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Why does sand turn into glass when exposed to extremely high temperatures? - Quora
Melting Sand Into Glass - YouTube
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Melting Sand Into Glass - YouTube
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How to Make Glass (with Pictures) - wikiHow
What is glass? | How is glass made? - Explain that Stuff
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Watch sand turn into glass objects | This solar-powered machine transforms sand into glass objects. In the middle of the Sahara desert. | By Mashable | Facebook
How to Make Glass (with Pictures) - wikiHow
