Why is there something rather than nothing? What existed before the Big Bang? How can everything we know to exist in the entire observable universe have spontaneously erupted out of thin air?
That's the focus of theoretical physicist and author Lawrence Krauss's new book, "A Universe from Nothing: Why There Is Something Rather than Nothing." I spoke with him in search of answers to these timeless questions. To hear what he had to say, watch the video above (or click the link below for a complete transcript). And, don't forget to weigh in by leaving a comment at the bottom of the page. Talk nerdy to me!