Charles Darwin (1809-1882) was a naturalist from England. He is well-known for his masterpiece, the ‘Origin of Species’. Darwin was a mediocre student. He obtained his degree in medicine from Cambridge University. Darwin’s Theory of Evolution revolutionized the different branches of science. In 1831, Darwin sailed on an expedition as a naturalist to South America and the Pacific Islands. During his voyage, Darwin spends 535 days at sea and around 1200 days on land. He carried out research for 20 years before he wrote the ‘Origin of Species’. Darwin married Emma Wedgwood, his first cousin in 1838. He contributed not only to the theory of evolution but also to the other branches of science including geomorphology and geography.