the lightest material ever created: a strong metal mesh about 25 percent less dense than the wispiest aerogel, a foamlike material that was the old record holder. A brick-size piece of the new mesh would weigh less than a paper clip.
Easy Fidget Spinner DIY (Free Template) - hce is a great how to make Fidget Spinners without bearings DIY. The use super basic materials and are easy to make. It includes a Free Fidget Spinner Template designs) and would be great Science Fair project
The Mohs scale of mineral hardness characterizes the scratch resistance of various minerals through the ability of a harder material to scratch a softer material. It was created in 1812 by the German geologist and mineralogist Friedrich Mohs