Charles Darwin
International Darwin Day celebrates the life of influential scientist Charles Darwin Creative Commons

Charles Darwin's theory of evolution by natural selection was a revolutionary challenge to Western civilisation in the 19th century. International Darwin Day, celebrated on 12 February, marks the birth of the English naturalist in 1809 and his influence on the advancement of science, education and human curiosity.

On the anniversary of Darwin's birth, we look at lesser-known facts about one of the most influential figures in science: