In the 1999 passage, “Retelling Experiments: H.B.D. Kettlewell’s Studies of Industrial Melanism in Peppered Moths” author, Joel B. Hagen recounts the story of one of the most famous breakthroughs in biological science. In the mid 1950s, the work of H.B.D. Kettlewell solved persisting loopholes in Darwin’s theory of natural selection by conducting several experiments using peppered moths. Kettlewell’s research is widely discussed in biology classes today, yet there is often deviation in how the story is told. However, Hagen suggests that many of these reiterations of Kettlewell’s work are generally presented as a “controlled experiment” according to sources from the past (144). Regarding the background of Kettlewell’s experiments, he investigated
