What do we really know? What are we in relation to the world around us? Here, the acclaimed playwright and novelist takes on the great questions of his career--and of our livesHumankind, scientists agree, is an insignificant speck in the impersonal vastness of the universe. But what would that universe be like if we were not here to say something about it? Would there be numbers if there were no one to count them? Would the universe even be vast,...