Large Hadron Collider

The  was a device built by CERN beneath France and Switzerland to find the Higgs particle. It collided protons in a circular tunnel with a circumference of twenty-seven miles. After a test lasting a few nanoseconds, it let out some neutron eaters. 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 was created as a side-effect. (BBCR: Lost Souls)