The Big Bang
The point in time when humans theorized all matter came into existence. In reality, short matter started to come into existence long before, eventually joining into normal matter. There was no sudden explosion and expansion of the universe, but due to our particular four dimensional space being warped by higher dimensions, it appears to be expanding in time from a three dimensional point of view. The Lights believe there could be an infinite number of places like the big bang throughout all twenty five dimensions of the universe, each making up its own separate universe of four dimensional matter.