"Dangerous Intersections"

Steve Strogatz's latest article in the New York Times concerns the fold catastrophe and its manifestation---quantitatively in some cases and in toy models in others---in various phenomena. (By the way, the example in footnote 10 is something that occurs in many of the threshold models of social influence that have become increasingly popular since a paper Duncan Watts published in 2002.)

(Tip of the cap to Mariano Beguerisse Díaz.)