Or, as its critics suggest, it may create a black hole that will swallow the entire planet.Built 300ft beneath the French Swiss border, it will fire atomic particles around its 17 mile circumference, 11,245 times every second before smashing them headlong into each other.
The result will, for a split second, replicate the conditions that existed in the moments immediately after the birth of the universe, known as the Big Bang. In a space a billion times smaller than a speck of dust, the collisions will create temperatures 100,000 times hotter than the centre of the sun.
So, is it time to max out the credit cards, tell your boss to stick his job and host an end of the world party? Or, like the millenium bug, is it going to be a damp squib?Opponents of the project had hoped to obtain an injunction from the European Court of Human Rights that would block the collider from being turned on at all, but the court rejected the application on Friday morning. However, the court will rule on allegations that the experiment violates the right to life under the European Convention of Human Rights.
Professor Otto Rössler, a German chemist at the Eberhard Karls University of Tübingen who is one of the most vocal opponents of the LHC and was one of the scientists who submitted the complaint to the court, said: "CERN itself has admitted that mini black holes could be created when the particles collide, but they don't consider this a risk.
"My own calculations have shown that it is quite plausible that these little black holes survive and will grow exponentially and eat the planet from the inside. I have been calling for CERN to hold a safety conference to prove my conclusions wrong but they have not been willing.
"We submitted this application to the European Court of Human Rights as we do not believe the scientists at CERN are taking all the precautions they should be in order to protect human life."
Professor Rössler claims that, in the worst case scenario, the earth could be sucked inside out within four years of a mini black hole forming.
Sucked inside out. What a way to go!