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Cyanometer circa 1789, an instrument that measures the blueness of the sky

Translucent Lightweight Concrete - It is made by Porjoel Sosa and Sergio Omar Galvan, Mexico. The material is 30% lighter but has the same strength, consistency and resistance as regular concrete, while allowing 80% light transmittance. It comes in a variety of colors.

flying peacock

The Friday Shirk Report - Volume 133

twistedsifter.com