The Big Bang Theater occupies the bottom half of the Hayden Sphere. Utilizing a screen that measures in diameter over an bowl, a four-minute program depicts the birth of the universe, with narration by Liam Neeson. The Big Bang Theater serves as an introduction to the Heilbrun Cosmic Pathway, a spiral which wraps around the sphere, connecting the second and first floors of the Rose Center. The cosmic pathway provides a timeline of the universe's history from the Big Bang to the present day. The Heilbrun Cosmic Pathway is one of the most popular exhibits in the Rose Center, which opened February 19, 2000.