Viscosity is a measure of the resistance of a fluid to deform under shear stress. Memory foam was originally developed by NASA to ease the pressure of extreme G-force during space shuttle take off. It was never used in the space program, but was subsequently used in medical applications, for example with patients suffering from pressure sores or bed-bound for a long period.
~~~ This of course brought to mind the story by Hans Christian Anderson. The Princess and the Pea.~~~~~~~~~~~
So hold the calls I will be seeing if I can locate any peas!Tee hee Once Upon a Mattress