Hacker Read

mbrameld | karma 1203 | avg karma 2.33 · 2016-09-06 19:43:29+00:00

At a certain density a crowd of people starts behaving more like a fluid than a group of individuals.

semi-extrinsic | karma 13245 | avg karma 3.42 · 2016-09-06 21:03:00+00:00

And the GP has rediscovered that viscosity is much higher for a fluid made up of long-chained molecules (think motor oil) than a fluid made up of short-chained ones (think gasoline).