Widely regarded as one of the most influential personalities in the history of mankind, Charles Darwin was an English biologist, naturalist, and geologist. He is credited with publishing the Theory of Evolution, which explains the evolution of life from a unicellular organism to human beings. A prolific writer, Charles Darwin also wrote important books on plants and barnacles.
Georges Cuvier was a French zoologist and naturalist. A major figure in the early 19th century's research of natural sciences, Cuvier played an important role in establishing the fields of comparative paleontology and anatomy by comparing fossils with living animals, for which he is sometimes regarded as the founding father of paleontology.
Born to anthropologist parents, Richard Leakey initially worked as a safari guide. On an expedition to Ethiopia, he and his men stumbled upon Koobi Fora, a site where they unearthed numerous tools and fossils. The Kenyan paleoanthropologist later lost his legs in a plane crash and now uses artificial limbs.