On Earth Day, April 22, 1PM-4PM, the Harvard Museums of Science and Culture (26 Oxford Street, Cambridge) will celebrate the 200th birthday of Alfred Russell Wallace (1823–1913), who discovered the theory of evolution by natural selection independently of Charles Darwin. HMSC will spotlight Wallace’s contributions to our understanding of biodiversity, highlighting why they are relevant to science today. Harvard students will 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. Free with regular museum admission. Free parking starting at noon at the 52 Oxford Street Garage.