Mapping the Darkness: The Visionary Scientists Who Unlocked the Mysteries of Sleep

The definitive story of the scientists who set out to answer two questions: “Why do we sleep?” and "How can we sleep better?”

A century ago, sleep was considered a state of nothingness-even a primitive habit that we could learn to overcome. Then, an immigrant scientist and his assistant spent a month in the depths of a Kentucky cave, making nationwide headlines and thrusting sleep science to the forefront of our consciousness.

In the 1920s, Nathaniel Kleitman founded the world's first dedi...