What is a black hole? Why do we remember the past but not the future? If time had a beginning, does it have an end? We don’t have the answers to some of the universe’s biggest questions. What we do know often feels bleak, such as the notion that in a billion years there will most likely be no life on Earth. Or the reality that someday the entire human race will probably be forgotten. Nonetheless, people search for answers. These are some of the cosmic questions that haunt the human experience.