In the spring of 1846, a group of nearly 90 emigrants left Springfield, Illinois, and headed west. Led by brothers Jacob and George Donner, the group attempted to take a new and supposedly shorter route to California. They soon encountered rough terrain and numerous delays, and they eventually became trapped by heavy snowfall high in the Sierra Nevada Mountains. Purportedly reduced to cannibalism to survive through the winter, only half of the original group reached California the following year. Their story quickly spread, and before long the term “Donner Party” became synonymous with one of humanity’s most ingrained taboos.