About This Video

The concept of the Big Bang Theory—the prevailing cosmological model of the early development of the universe—brings up many difficult questions that go against our notions of reality. What happened before the big bang? If there was no space before the big bang, where did it happen? Physicist Brian Greene tackles these questions and more regarding the beginnings of the beginning.

Image of the Sombrero Galaxy taken by the Hubble Space Telescope; Recorded June 2009; Posted April 2011