Piotr Naskrecki Piotr Naskrecki The Very Hungry Caterpillar and the Ecosystem Caterpillars are a remarkable bellwether of environmental changes. By Katharine Gammon Sign up for our monthly newsletter! If you give a caterpillar a leaf, chances are he’s going to tell you about the state of the world. This is what chemical ecologist Tara Massad...