Neil deGrasse Tyson is an important astrophysicist and also one of our current great science popularizers. This audiobook is a bit over three hours of Tyson talking about some of the biggest unanswered questions in science right now, as well as a bit of history about past mysteries, since resolved. Tyson is, as always, smart, informative, and easy to listen to. He's got a great voice as well as a great speaking manner.
I bought this book.