Charles Darwin (1809-1882) was a British naturalist. At a time, when people still believed that each living creature was created by God, he began his research on finches on the Galapagos Islands to the west of South America. He found that all finches originated from a single species. This turned the prevalent picture of nature as God’s creation upside down and he faced a lot of opposition from the Church. However, his theory was accepted quickly by his colleagues, and when he published his ‘theory of evolution’, the book was quickly sold out.