Taphephobia is the psychopathological fear of being buried alive. Before the advent of modern medicine, this fear was not entirely irrational. Throughout history, there have been many cases of people being accidentally buried alive, and the horrific prospect has been a favorite subject of urban legends and literature, including several stories by Edgar Allan Poe. During the 18th and 19th centuries, such fears led to a large number of designs for “safety coffins,” which employed what safeguards? Discuss
Source: The Free Dictionary