Leonardo De Vinci was fascinated by flight and dreamed of various flying machines. He was realistic enough, though, to consider the risks and thought that brave men who strapped on wings should...
The sunglasses at the dollar store feel flimsy, yet I buy a pair. It costs me $1.43. The sticker on one of the lenses states “UV 400 Protection”. I walk over to a fancy sunglasses store and ask the...
Way back in 1771, Swedish chemist Karl Wilhelm Scheele was investigating the properties of a mineral known as fluorspar (calcium fluoride). He mixed the pulverized rock with sulfuric acid and...
Just like Vivaldi was inspired by nature to compose his Four Seasons concertos, the inventor of Velcro was also inspired by nature. Specifically, by burrs.
Pencils do not contain any lead, and they never did! The mistake in terminology can be traced back to the ancient Romans who drew lines on papyrus using pieces of actual lead, all the while not...
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