When branes collide...
If the assumption that we are confined in a brane that lives in a higher dimension, is true, then we could find humanity's most sought after answer to the fundamental question: What was before the Universe was created?
The origin of the Big Bang could be in the collision of two branes in higher dimensions.
1. Find more info on extra dimensions, Big Bang, string theory and time in the second part of Gary Horowitz's, EinsteinFest Lecture: Strange Views of Space and Time: From Einstein to String Theory
2. My previous post on Simon Singh's Big Bang PI lecture.