The UnBelievable with Dan Aykroyd (2023)

S03E19 Maddest Minds

A doctor once swallowed the vomit of a yellow fever patient to test his theory on how the disease spread. Another surgeon sewed a second head onto a dog, creating a bizarre two-headed creature. These are just two examples of history's most daring experiments—where brilliant minds pushed past ethics and common sense in pursuit of knowledge, no matter the cost.