the.com/viscosity
the universe's way of telling fluids to slow down and think it over
means Viscosity is a fluid's internal resistance to flowing — how thick and sluggish it is, the reason honey crawls while water races.
from From Latin 'viscum,' meaning mistletoe — and the sticky birdlime made from its berries that fowlers smeared on branches to trap birds. Late Latin grew 'viscosus,' meaning 'sticky,' which English borrowed through the sciences as 'viscosity.' So buried in the word for how slowly molasses pours is the memory of a clingy white-berried plant and the glue squeezed from it.
pitch dropTar flows so slowly one drop falls per decade
honey vs waterHoney is roughly 2,000 times thicker than water
shear thinningKetchup gets runnier the harder you shake it
glass mythOld window glass doesn't actually flow downward over centuries
poise unitNamed after physicist Poiseuille, who studied blood flow