Ed Walters speaks with Albert Einstein and mentions his theory of relativity. Einstein humbly says he too is still figuring out how his theories work.

Albert Einstein's teacher talks to him about his academic performance in a school he attended

Einstein is disappointed in himself, so the Warners sing the ACME song to cheer him up. In the process, they help him develop the mass-energy equivalence formula, E = mc2.

Hank provides background information on the biologist who contributed to evolutionary history: Charles Darwin. He also explains the four principles of Darwin's idea of natural selection, which are variation, heritability, struggle for existence, and survival and reproduction rates. Key Words: Genetic Drift, Fitness, Variations of Phenotype, Heritable, The Struggle for Existence, Survival and Reproduction Rates

Bill Nye narrates the story of how photosynthesis was discovered. He explains the hypothesis of the experiment that shed light on how plants generate energy.