Charles Darwin ushered in modern biology with his explanation of how different species evolve. But his work leaves us with a paradox: Why should dozens or even thousands of species coexist in a single habitat? The theory suggests they ought to duke it out until just a few winners dominate.
John Vucetich is with the Isle Royale wolf-moose research project, the longest continuous study of any predator-prey system in the world. He's also the co-founder of the Conservation Ethics Group, a consultancy that helps address challenges involving both environmental science and ethics.