Why are these caterpillars climbing over each other? The surprising science behind the swarm.

Imagine you’re deep in the Amazon rainforest, and you come across this.. thing. It’s a group of caterpillars, moving in a formation known as a rolling swarm. If you’re anything like me, your first reaction might be to KILL IT WITH FIRE. Once this irrational fear subsides, your second reaction might be to understand what these caterpillars […]