Charles Darwin wrote 25 published books during his lifetime. He wrote his last book in 1881, titled "The Formation of Vegetable Mould, through the Actions of Worms, with Observations on Their Habits." Charles Darwin died on April 19 the following year and was buried in Westminster Abbey.
Initially, Darwin studied medicine at Edinburgh University. In 1831, his plans changed as he embarked on a five-year scientific expedition on the ship HMS Beagle. The trip eventually landed Darwin to the Galapagos Islands. During his exploration of the islands, Darwin noticed that each island contained finches that were slightly different from those on neighboring islands. When he returned to England in 1836, Darwin's curiosity on his observations sparked his interest in natural selection and evolution. Darwin spent 20 years researching his theory and published "On the Origin of Species by Means of Natural Selection" in 1859.