Nature is not always nice. On this day eighty years ago in 1931, a swarm of grasshoppers ate their way across America’s heartland devastating millions of acres in Iowa, Nebraska and South Dakota. The area was already suffering from a drought, providing optimal conditions for insect egg pods. The population exploded and the locust and grasshoppers swarmed.
Check out this video explaining the signal that organizes solitary animals into mass munching madness.