Fig. 2.

The growth of the six largest strands vs. time from a typical experiment; the distance has been scaled to the diameter of a particle. The dashed line is the path of the average speed of the winning strand. The Insets show that the distance that the lead particle moves correlates well with the number of particles in the strand, meaning that a lead particle of a strand moves by recruiting particles in its trail. The dashed lines in the Insets are again the paths of the average speed for each strand.