Geochemists traditionally pursue discovery based science, whereas ecologists often follow a more traditional and rigid hypothesis-based approach to their work. As a biogeochemist, I have followed both approaches and let my curiosity lead me to the most interesting science. Stable isotope methods and instrumentation “grew up” in earth science departments, but eventually ecologists and biologists have realised how powerful these methods are for figuring out major questions such as who is eating whom in a food web. Not only is the source of an animal’s diet important, but dietary resources and thus energy flow in an ecosystem is something that...

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