Silly putty invented…

xxsilly-putty

Silly Putty is a toy based on silicone polymers that have unusual physical properties. It bounces, but breaks when given a sharp blow and can also flow like a liquid. It contains a viscoelastic liquid silicone, a type of non-Newtonian fluid, which makes it act as a viscous liquid over a long time period but as an elastic solid over a short-time period. It was originally created during research into potential rubber substitutes for use by the U.S. in World War II, but did not find a market until March 6th in 1950. (I’m entering this today to save tomorrow for Dentist’s Day.)

The name Silly Putty is a trademark of Crayola, though similar substances are available by other manufacturers. (from Wikipedia)

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