If you are not familiar with Alfred Russel Wallace, you are not alone. Wallace (1823–1913) holds a relatively obscure place in the history of science, despite discovering the theory of evolution by natural selection independently of Charles Darwin. On the bicentenary of his birth and in celebration of Earth Day, the Harvard Museum of Natural History spotlights Wallace’s contributions to our understanding of biodiversity and highlight why they are relevant to science today. Harvard students share his legacy as a visionary scientist, a daring naturalist and a passionate human rights advocate through stories and objects that reflect his professional achievements and travels in the Amazon and Indonesia.