Gould became widely known through his popular essays on evolution in the "Natural History" magazine. His essays were published in a series entitled "This View of Life" (a phrase from the concluding paragraph of Charles Darwin's "Origin of Species") from January 1974 to January 2001, amounting to a continuous publication of 300 essays. Many of his essays were reprinted in collected volumes that became bestselling books such as "Ever Since Darwin" and "The Panda's Thumb", "Hen's Teeth and Horse's Toes", and "The Flamingo's Smile".