bacteria in a turbulent flow
Simulation of bacteria in a turbulent flow. A spherical patch of nutrient (shown by the green isosurface) was released at an earlier time in
fully-developed isotropic turbulence. High concentrations of bacteria are shown in blue. The bacteria have the ability to swim up nutrient gradients
(known as chemotaxis) and start uniformly distributed throughout the volume, but are able to cluster around the nutrient filaments.
John Taylor, MIT 
