Most of us have heard of the plague of locusts. But did you know that to this day, desert locust plagues still threaten the food security of millions? In this episode, Yannick Günzel and Inga Petelski will tell us all about how the population density and social order within a locust population can transform shy, solitary locusts into hungry, gregarious ones who are ready to march with millions of their friends to search for the next meal.