Walt Disney borrowed most of the US$1.5 million needed to make Snow White and the Seven Dwarfs. It took 3 years to complete and became the highest-grossing sound film of its time.

Alfred Nobel, of the Nobel Prize, lost his brother to an accident at his lab. They were working with liquid nitrogen and attempting to create a more stable explosive. Nobel was able to complete his research after the accident and invented dynamite.

The lesser mole rat not only digs an entire subterranean house for itself, complete with storerooms, halls, bedrooms, and a “wedding chamber” where all mating takes place, but actually constructs a separate bathroom which, when filled, is sealed off from the rest of the house.