The following is an article from Uncle John's Heav... ...ainium" to describe rare or possibly non-existent materials . Vibranium: A recurring substance in Marvel Co...
https://www.neatorama.com/2011/01/10/unobtaniums/
Unobtaniums...
Light-Transmitting, See-Through ... Concrete?!...
This is real, construction-grade concrete. It is n... ...t affect the structural integrity of the building material . Filled with optical fibers that run from one end...
https://www.neatorama.com/2009/03/08/light-transmitting-see-through-concrete/
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