²ÊÉñix¹ÙÍø

Diane O’Brien, a nutritional ecologist, thought it was a no-brainer to use stable isotope signatures to discover what people are eating.

She used these naturally occurring markers frequently to study the diets of butterflies and other bugs. Stable isotopes as food markers are a commonly used tool for ecologists—those who study living things and their relationship with each other and the environment.