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Calculate the number 819

NUMBERMANIA: Calculate the number 819 using numbers [8, 5, 2, 8, 40, 649] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.

Correct answers: 2

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April Fool's Day - Kid’s Socks

Sew one of your kid’s socks closed halfway down. If you’re the sewing type this prank will leave you in stitches.

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Glass wool

In 1938, R. Games Slayter (died 15 Oct 1964) and John H. Thomas patent glass wool and the machinery to make it. Games Slayter, the driving force behind Owens Corning technology and innovation, sought to make a finer glass fiber material. In 1932, Dale Kleist, a young researcher under Jack Thomas (Slayter's research assistant), working on an unrelated experiment accidentally caused a jet of compressed air to strike a stream of molten glass, resulting in fine glass fibers. By Fall 1932, Kleist refined the process by using steam, to make glass fiber material thin enough for commercial fiber glass insulation. From March 1933, Games Slayter directed Jack Thomas in experiments using glass wool, instead of natural or other synthetic fibers, on textile machinery.

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