Couples collide with fewer people on walks than pairs of friends do

{Couples} are much less more likely to bodily stumble upon different folks when strolling in busy public areas than pairs of acquaintances or work colleagues are. Nonetheless, including a toddler into the combination makes the group extra more likely to have a collision.

When creating mathematical fashions for the way folks transfer in crowds, researchers usually borrow strategies from particle physics. However there may be one notably vital means that two folks in a crowded hall can differ from a pair of particles – …