10 September

On 10 September 2008, CERN first tested their Large Hadron Collider, (TV: Extremis) for just a few nanoseconds at first, accidentally opening a portal to another reality, and letting neutron eaters loose. When the collider started up properly, Professor Johnson and Jack Harkness had protons and antiprotons fired upon one another to cancel each other out. This closed the portal to the neutron eaters' dimension, and the Higgs particle, the fundamental particle of existence, was created as a side-effect. (AUDIO: Lost Souls)