We've learned about the speed of sound and the speed of light, but what about the speed of smell? More specifically, is it possible to outrun a smell? In the video above, the brilliant folks of AsapScience look into this important matter, calculating whether or not it's possible to crop dust a room without getting a whiff of your own poison. Smells travel through diffusion, a process in which particles move from an area of high concentration to low concentration, until reaching a state of equilibrium.