Episode 100, y'all! Beautiful Jim Key was born sickly and weak, but became world famous and is remembered as the smartest horse in the world. His training and care came from a former enslaved man named Doctor William Key, and together, they made a profound impact on the world.Likewise, Marjorie Courtenay-Latimer was a museum curator in South Africa who discovered a fish believed to be extinct in 1938. The discovery made a tremendous impact on science and natural understanding. Plus, she was very cool.