[applause] >> we just saw a panel from book's tv with dan balz's book. booktv continues live coverage of the tucson festival of books sunday at 1:00 pm. >> in his latest book "from eternity to here," researcher sean carroll shares his insight on time and the origins of the universe. the book works in del mar, california, is the host of this book. it lasts about an hour. [applause] >> thanks, lisa. it's great to be here. it's great to be at any independent bookstore in the united states. i'm very, very happy to have these kinds of events. [applause] >> and, you know, i'm also happy but i've stopped being surprised to see a whole bunch of people deciding the best way they can spend their thursday evening is thinking about the beginning of the universe and the origin of time. but i do -- i do need to explain, you know, part of why this particular question is the question we're being asked. at one point, you know, i mentioned to a student that i was thinking about -- as lisa said why time runs forward rather than backwards. and the response was, and after th